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235 results on '"Département de Photochimie Générale (DPG)"'

1. The synthesis and formulation of photosensitive resins towards: low line edge roughness of high resolution photolithography patterns

Author: Ismailova, Esma, Chochos, Christos L., Brochon, Cyril, Leclerc, Nicolas, Serra, Christophe A., Hadziioannou, Georges, Tiron, Ralouca, Sourd, Claire, Foucher, Johann, Bandelier, Philippe, Perret, Damien, Brault, Christophe, Ridaoui, Hassam, Soppera, Olivier, Laboratoire d'Ingenierie des Polymères pour les Hautes Technologies, Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institute of Physical Chemistry 'Demokritos' (IPC), National Center for Scientific Research 'Demokritos' (NCSR), Lithography Laboratory, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Rohm et Haas Electronic Materials, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique ( CNRS ) -Université Louis Pasteur - Strasbourg I, Institute of Physical Chemistry 'Demokritos' ( IPC ), National Center for Scientific Research 'Demokritos' ( NCSR ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Département de Photochimie Générale ( DPG ), Université de Haute-Alsace (UHA) Mulhouse - Colmar ( Université de Haute-Alsace (UHA) ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I, and Turck, Colette
Subjects: [ CHIM.POLY ] Chemical Sciences/Polymers, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.POLY] Chemical Sciences/Polymers, [CHIM.POLY]Chemical Sciences/Polymers, [ CHIM.MATE ] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry
Published: 2008

2. Light-Induced Thermal Decomposition of Alkoxyamines upon Infrared CO2 Laser: Toward Spatially Controlled Polymerization of Methacrylates in Laser Write Experiments

Author: Jacques Lalevée, Didier Gigmes, Aude-Héloise Bonardi, Frédéric Dumur, Yangyang Xu, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Dumur, Frederic
Subjects: Materials science, General Chemical Engineering, 02 engineering and technology, 010402 general chemistry, Photochemistry, Methacrylate, 01 natural sciences, Article, law.invention, chemistry.chemical_compound, law, QD1-999, ComputingMilieux_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, Thermal decomposition, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, Photothermal therapy, 021001 nanoscience & nanotechnology, Laser, 0104 chemical sciences, Chemistry, Monomer, Photopolymer, chemistry, Polymerization, Heat generation, 0210 nano-technology
Abstract: Systems combining photopolymerization and thermal polymerization have already been reported in the literature. Upon near-infrared (NIR) light exposure, this principle of polymerization is called photoinduced thermal polymerization or photothermal polymerization. Thanks to an NIR dye used as the light-to-heat convertor (called hereafter a heater), an alkoxyamine (e.g., BlocBuilder-MA) is dissociated upon NIR light irradiation, initiating the free-radical polymerization of methacrylates. In the present paper, a novel approach is presented for the first time to decompose the alkoxyamine through a direct heat generation upon mid-infrared irradiation by a CO2 laser at 10.6 μm. Compared with previous approaches, there is no additional heater used in this work, as the heat is directly generated by laser irradiation on the alkoxyamine/monomer system. The polymerization can be initiated for benchmark methacrylate monomers with spatial controllability, that is, only in the laser-irradiated area, opening the way for laser write or three-dimensional printing applications in the presence of fillers.
Published: 2020
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3. Design of new phenothiazine derivatives as visible light photoinitiators

Author: Mira Abdallah, Tayssir Hamieh, Bernadette Graff, Joumana Toufaily, Thanh-Tuân Bui, Frédéric Dumur, Jacques Lalevée, Fabrice Goubard, Mahmoud Rahal, Université de Strasbourg (UNISTRA), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie Radicalaire (ICR), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Lebanese University [Beirut] (LU), and Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Polymers and Plastics, Organic Chemistry, Radical polymerization, Cationic polymerization, Bioengineering, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Biochemistry, Fluorescence spectroscopy, 0104 chemical sciences, chemistry.chemical_compound, Photopolymer, Polymerization, chemistry, Phenothiazine, Fourier transform infrared spectroscopy, 0210 nano-technology, Spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract: In this article, four new phenothiazine derivatives (denoted as PT1, PT2, PT3 and PT4) are specifically in silico designed by molecular modelling for good light absorption properties @405 nm. The most interesting structures showing both intense violet/blue light absorption and high potential photochemical reactivity were synthesized for detailed investigations as photoinitiators/photosensitizers in the presence of an iodonium salt for the free radical photopolymerization of (meth)acrylates and the cationic polymerization of epoxides upon near-UV or visible light irradiation. Remarkably, two of the proposed structures (PT3 and PT4) from this in silico design were never synthesized prior to this work and were thus specifically designed for this work. Three-component photoinitiating systems based on PT/iodonium/amine (N-phenylglycine or ethyl 4-dimethylaminobenzoate) are also developed for the free radical polymerization of acrylates. Both excellent polymerization rates and high final reactive function conversions were obtained. A full picture of the photochemical mechanisms is provided using different techniques: real-time Fourier transform infrared spectroscopy, UV-visible spectroscopy, fluorescence spectroscopy, and cyclic voltammetry. Finally, the high performance of the phenothiazine derivatives is also shown in 3D printing experiments as well as in photocomposite synthesis using glass fibres (thick sample; using a LED@395 nm conveyor).
Published: 2020
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4. High performance dyes based on triphenylamine, cinnamaldehyde and indane-1,3-dione derivatives for blue light induced polymerization for 3D printing and photocomposites

Author: Mira Abdallah, Frédéric Dumur, Bernadette Graff, Akram Hijazi, Jacques Lalevée, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Strasbourg, Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I-Institut de Chimie du CNRS (INC), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université Louis Pasteur - Strasbourg I-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, General Chemical Engineering, Radical polymerization, Indane, 02 engineering and technology, TMPTA, 010402 general chemistry, Photochemistry, Triphenylamine, 01 natural sciences, chemistry.chemical_compound, Dyes, Acrylate, Photoinitiator, Photopolymerization, 3D printing resin, Process Chemistry and Technology, Cationic polymerization, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Photopolymer, chemistry, Polymerization, Free Radical Polymerization, 0210 nano-technology
Abstract: In this research, high performance dyes based on triphenylamine, cinnamaldehyde and indane-1,3-dione derivatives have been designed/synthesized and evaluated as photoinitiators for visible light photopolymerization. The introduction of light-emitting diodes (LEDs) as low-cost and secured sources of irradiation is one of the major purposes in this study, where a LED at 405 nm was used for both the cationic polymerization (CP) of thin epoxide samples and the free radical polymerization (FRP) of thin TMPTA films. The proposed dyes showed very high efficiencies in the presence of the two-component photoinitiating systems based on Dye/Iodonium salt (Iod) couples or Dye/Amine (such as N-Phenylglycine (NPG) or ethyl 4-(dimethylamino)benzoate (EDB)) couples for the FRP and/or CP, highlighting their importance through a photo-oxidation (with Iod) process but also through a photo-reduction (with amine) process. The examined dyes are also able to initiate the FRP of thin acrylate films in the presence of the three-component (Dye/Iod/NPG) systems where very high rates of polymerization (Rp) and great final reactive function conversions (FCs) were achieved. A new dye (Dye 4) is proposed here for the first time (never synthesized before) and a new synthetic pathway for Dye 3 is also established. Objectives of this work concern the study of the photoinitiating abilities of the different photoinitiating systems using FTIR technique but also the study of the chemical mechanisms which was mainly examined in solution. The use of the investigated systems for 3D printing experiments (using LED projector or laser diode @405 nm) is particularly outlined. Finally, the production of thick glass fiber photocomposites presenting excellent depth of cure is also accomplished in the presence of these dyes (using near-UV conveyor: LED@395 nm).
Published: 2020
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5. Different NIR dye scaffolds for polymerization reactions under NIR light

Author: Aude Héloïse Bonardi, Jacques Lalevée, Didier Gigmes, Frédéric Dumur, Guillaume Noirbent, Fabrice Bonardi, Jean Pierre Fouassier, Céline Dietlin, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Dumur, Frederic
Subjects: Materials science, Polymers and Plastics, Radical polymerization, Bioengineering, 02 engineering and technology, 010402 general chemistry, Methacrylate, Photochemistry, 01 natural sciences, Biochemistry, chemistry.chemical_compound, [CHIM]Chemical Sciences, Cyanine, ComputingMilieux_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, Organic Chemistry, Photothermal effect, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Porphyrin, 0104 chemical sciences, Photopolymer, chemistry, Polymerization, 0210 nano-technology, Phosphine
Abstract: WOS:000501007300010; In this article, near-infrared dyes of different structures have been investigated as new photoinitiators/photosensitizers for the free radical polymerization (FRP) of methacrylates upon Near InfraRed (NIR) light exposure using a laser diode @785 nm, @940 nm and @1064 nm. Interestingly, the use of squaraine, squarylium, boron-pyrromethene and porphyrin derivatives as efficient photoinitiators is clearly highlighted. These dyes are used in combination with an iodonium salt and a phosphine. Additionally, a thermal initiator can be added to the resin to take advantage of the photothermal effect, i.e., to the heat release during the polymerization process, so that polymerization kinetics could be greatly improved compared to the pure photochemical mode. These dyes can be proposed as alternatives to the well-established cyanine dyes, more commonly used for the photopolymerization of (meth)acrylates under NIR light.
Published: 2019
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6. Assessing Mesoscopic Organization in Copolymer-Templated Silica Hybrid Films via Solid-State Nuclear Magnetic Resonance

Author: Bénédicte Lebeau, Loïc Vidal, Mathilde Sibeaud, Séverinne Rigolet, Abraham Chemtob, Laure Michelin, Céline Croutxé-Barghorn, Cyril Vaulot, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de Photochimie et d'Ingénierie Macromoléculaires (LPIM), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Lebeau, Bénédicte, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Matériaux à Porosité Contrôlée (LMPC), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Ecole Nationale Supérieure de Chimie de Mulhouse-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, 1H Nuclear relaxometry, 02 engineering and technology, Mesoporous, Poloxamer, 01 natural sciences, chemistry.chemical_compound, [CHIM] Chemical Sciences, 0103 physical sciences, Materials Chemistry, Copolymer, Magic angle spinning, [CHIM]Chemical Sciences, Mesostructuration, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, [CHIM.MATE] Chemical Sciences/Material chemistry, Sol-gel, Amphiphilic block copolymer, Ethylene oxide, Relaxation (NMR), Metals and Alloys, Surfaces and Interfaces, Nuclear magnetic resonance spectroscopy, Self-assembly, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, NMR spectra database, [CHIM.POLY]Chemical Sciences/Polymers, Solid-state nuclear magnetic resonance, Chemical engineering, chemistry, 13. Climate action, Proton NMR, Hybrid materials, 0210 nano-technology
Abstract: International audience; In the context of increasing use of nanostructured materials, finding innovative characterization methods able to assess precisely the level of ordering is essential. To this end, a range of model organic-inorganic copolymer-silica films is synthesized using poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) amphiphilic triblock copolymer as supramolecular template. Upon increasing copolymer concentration (10-100 wt%), the order can be gradually enhanced from short-range to long-range as proved by conventional techniques such as X-ray diffraction and electron microscopy. To evaluate the level of mesoscopic organization, the same series of samples is also analyzed by solid-state NMR spectroscopy. The disorder-to-order transition is probed by 1 H and 13 C magic angle spinning nuclear magnetic resonance (NMR) spectra through the increase in chemical environment uniformity and chain mobility respectively, which both result from the self-assembly mechanism. 1 H NMR relaxation measurements (T2) using low-field NMR spectroscopy are instrumental to identify the threshold template concentration where ordering takes place.
Published: 2020
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7. In silico rational design by molecular modeling of new ketones as photoinitiators in three-component photoinitiating systems: application in 3D printing

Author: Hong Chen, Pu Xiao, Fabrice Morlet-Savary, Ke Sun, Bernadette Graff, Jacques Lalevée, Frédéric Dumur, Céline Dietlin, Yangyang Xu, Data61 [Canberra] (CSIRO), Australian National University (ANU)-Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Northwest A&F University, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Strasbourg (UNISTRA)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Research School of Chemistry, Australian National University (ANU), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Dumur, Frederic
Subjects: Reaction mechanism, Materials science, Ketone, Polymers and Plastics, Molecular model, Bioengineering, 02 engineering and technology, TMPTA, 010402 general chemistry, Photochemistry, 01 natural sciences, Biochemistry, chemistry.chemical_compound, medicine, chemistry.chemical_classification, Acrylate, [CHIM.MATE] Chemical Sciences/Material chemistry, Organic Chemistry, Rational design, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Photopolymer, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Triethanolamine, 0210 nano-technology, medicine.drug
Abstract: International audience; One of the main challenges in the field of 3D printing/vat photopolymerization is the poor adaption of existing commercial photoinitiators (PIs) for the recently popular 3D printers with the irradiation wavelength at 405 nm. It is thus desirable to design and develop high-performance PIs which can work efficiently at this wavelength. In this work, different ketones were specifically designed by molecular mod-eling for good light absorption properties at 405 nm and the best theoretical structures showing intense violet/blue light absorption were synthesized for further investigation. The new proposed ketones were used in conjunction with different tertiary amines (e.g. ethyl dimethylaminobenzoate (EDB) or triethanol-amine (TEA)) and iodonium salt as photoinitiating systems (PISs) for the photopolymerization of trimethyl-olpropane triacrylate (TMPTA) and Ebecryl 40 (a tetrafunctional polyether acrylate) via an oxidation-reduction reaction mechanism. The results demonstrate that several ketone-based PISs can initiate free radical photopolymerization. The final conversions of Ebecryl 40 resin are higher than those of TMPTA, particularly in the presence of TEA. In addition, the light absorption properties and the photoinitiation mechanisms are also studied using UV-Visible absorption spectra, cyclic voltammetry, and fluorescence approaches. Moreover, the formation of the radicals is clearly determined by the electron spin resonance (ESR) spin-trapping experiments. Finally, the developed ketone-based three-component systems are applied to the generation of macroscopically stereoscopic letter patterns using the 3D printing technique. This research is expected to offer some fresh insights into photopolymerization reactions with three-component photoinitiating systems used in 3D printing. All this work shows that the in silico rational design of new photoinitiators by molecular modeling for specific wavelength (here 405 nm) and specific applications is a powerful tool for the development of high performance photosensitive resins.
Published: 2020
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8. Branching effect on the linear and nonlinear optical properties of styrylpyrimidines

Author: Françoise Robin-le Guen, Michaela Fecková, Claudine Katan, Mihalis Fakis, Fotis Kournoutas, Filip Bureš, Jean-Pierre Malval, Arnaud Fihey, Arnaud Spangenberg, Pascal Le Poul, Sylvain Achelle, University of Patras, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), University of Pardubice, HOLED, Région Bretagne, 2019-A0060800649, Grand Équipement National De Calcul Intensif, University of Patras [Patras], Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Rennes-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), University Pardubice, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), and KATAN, Claudine
Subjects: Materials science, Absorption spectroscopy, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, General Physics and Astronomy, Electron, Chromophore, [CHIM.ORGA] Chemical Sciences/Organic chemistry, 010402 general chemistry, Triphenylamine, Branching (polymer chemistry), 01 natural sciences, Molecular physics, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry, chemistry.chemical_compound, chemistry, Polar effect, Molecule, Physical and Theoretical Chemistry, Time-resolved spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; This contribution aims at investigating the branching effect on the steady state, time resolved fluorescence and two-photon absorption (2PA) properties of dimethylamino and diphenylamino substituted styrylpyrimidine derivatives, by means of a combined experimental and theoretical study. In contrast to classical branched molecules with a triphenylamine central core and electron accepting groups at the periphery, here, branched molecules with reverse topology and different symmetries are examined, namely a styrylpyrimidine group is used as the electron withdrawing core and dimethylamino or diphenylamino donors are incorporated at the periphery. Besides, compared to the great majority of existing branched systems, the herein studied molecules do not have C3 symmetry. For this reason, the region of the linear and non-linear optical spectra of the two and three branched chromophores is actually similar. Interestingly, while the one-photon absorption spectra of one-branched systems versus two- or three-branched ones are spectrally shifted, there is almost no spectral shift in the main 2PA spectral region. Meanwhile, there is still an enhancement of both linear and nonlinear optical responses. Overall, here we developed a strategy that enhances the 2PA response while maintaining the spectral position. Specifically, 2PA cross section values as high as 500 GM have been obtained for the diphenylamino A–(π–D)3 molecule in dichloromethane.
Published: 2020
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9. Iodinated Polystyrene for Polymeric Charge Transfer Complexes: Toward High-Performance Near-UV and Visible Light Macrophotoinitiators

Author: Jacques Lalevée, Bernadette Graff, Jean Pierre Fouassier, Céline Dietlin, Patxi Garra, Fabrice Morlet-Savary, Sami Lakhdar, Alexandre Baralle, Université de Strasbourg (UNISTRA), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Laboratoire de Gestion des Risques et Environnement (GRE), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de chimie moléculaire et thioorganique (LCMT), Centre National de la Recherche Scientifique (CNRS)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)
Subjects: Materials science, Polymers and Plastics, Radical polymerization, Electron donor, 02 engineering and technology, 010402 general chemistry, Photochemistry, 01 natural sciences, Inorganic Chemistry, chemistry.chemical_compound, Materials Chemistry, ComputingMilieux_MISCELLANEOUS, chemistry.chemical_classification, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Organic Chemistry, Polymer, Electron acceptor, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Polymerization, Polystyrene, 0210 nano-technology, Photoinitiator, Visible spectrum
Abstract: In recent works, charge transfer complexes (CTCs) have proved to be useful photoinitiating agents to trigger free radical polymerization. However, because of their low molecular weights, migration issues remain very important. In line with pressing migration concerns around photoinitiating systems (e.g., in 3D polymer networks), we report here the use of the first polymeric CTC based on iodinated polystyrene/amine interactions. This study shows the formation of the CTC between the polystyrene derivative (electron acceptor EA) and a tertiary alkylamine (electron donor ED); the ability of this EA/ED couple in a CTC to act as a photoinitiator for the polymerization of multifunctional acrylates upon LED@405 nm irradiation is investigated. Examples of applications to 3D-resolved laser write of thick controlled samples (1 mm) are provided.
Published: 2019
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10. Charge Transfer Complexes as Dual Thermal and Photochemical Polymerization Initiators for 3D Printing and Composites Synthesis

Author: Bernadette Graff, Jean-Pierre Fouassier, Patxi Garra, Sami Lakhdar, Mira Abdallah, Dengxia Wang, Jacques Lalevée, Haifaa Mokbel, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Université de Strasbourg (UNISTRA), Laboratoire de chimie moléculaire et thioorganique (LCMT), Centre National de la Recherche Scientifique (CNRS)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)
Subjects: chemistry.chemical_classification, Materials science, Polymers and Plastics, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Process Chemistry and Technology, Organic Chemistry, Radical polymerization, Glass fiber, 02 engineering and technology, Electron acceptor, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, Methacrylate, 01 natural sciences, 0104 chemical sciences, Photopolymer, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Polymerization, Composite material, 0210 nano-technology, Curing (chemistry), ComputingMilieux_MISCELLANEOUS, Visible spectrum
Abstract: The development of visible light 3D printing technology and the preparation of high-tech composites under mild conditions remain a huge challenge. This article is devoted to the development of dual thermal/photochemical initiators both for visible light 3D printing and composite preparation under mild conditions. Dual thermal and photochemical polymerization initiators are presented, a dual ability scarcely encountered in the literature. In detail, here, a series of charge transfer complexes (CTCs) that are demonstrated to be formed between phosphines (electron donors) and iodonium salt as electron acceptor are investigated as dual thermal and photochemical free radical polymerization (FRP) initiators. The CTCs exhibit excellent photo and/or thermal initiating properties for the benchmarked methacrylate resin and can be efficiently used for the curing of glass fibers or carbon fiber composites. To the best of our knowledge, this is the first access to high-tech carbon fiber composites using dual photo/the...
Published: 2019
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11. Combining Molecularly Imprinted Polymers (MIPs) with Micro (Opto) Electro Mechanical Systems (M(O)EMS) for improved chemical sensing

Author: Ayela, Cédric, Bokeloh, Frank, Soppera, Olivier, Haupt, Karsten, Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Génie Enzymatique et Cellulaire (GEC), and Université de Technologie de Compiègne (UTC)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI]Engineering Sciences [physics], ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2019

12. Phylogenomics of palearctic Formica species suggests a single origin of temporary parasitism and gives insights to the evolutionary pathway toward slave-making behaviour

Author: Jonathan Rolland, Laurent Keller, Claire Morandin, Jonathan Romiguier, Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), Centre d'Ecologie et des Sciences de la COnservation (CESCO), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, and Biosciences
Subjects: HYBRID ANTS, 0106 biological sciences, 0301 basic medicine, Social parasitism, Entomology, Evolution, [SDV]Life Sciences [q-bio], GENOMES, Parasitism, SEQUENCE DATA, Biology, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, 010603 evolutionary biology, 01 natural sciences, ANTS HYMENOPTERA, Transcriptomes, 03 medical and health sciences, Species Specificity, Formica, Slave-making, Phylogenetics, Genus, Phylogenomics, QH359-425, Parasites, PHYLOGENETIC RECONSTRUCTION, Social Behavior, Symbiosis, Phylogeny, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, LEPTOTHORACINE ANTS, Behavior, Animal, Phylogenetic tree, Arctic Regions, Ants, ANIMALS, EUSOCIAL INSECTS, Eusociality, ALIGNMENT, 030104 developmental biology, Evolutionary biology, 1181 Ecology, evolutionary biology, INFERENCE, Subgenus, Research Article
Abstract: Background: The ants of the Formica genus are classical model species in evolutionary biology. In particular, Darwin used Formica as model species to better understand the evolution of slave-making, a parasitic behaviour where workers of another species are stolen to exploit their workforce. In his book “On the Origin of Species” (1859), Darwin first hypothesized that slave-making behaviour in Formica evolved in incremental steps from a free-living ancestor. Methods: The absence of a well-resolved phylogenetic tree of the genus prevent an assessment of whether relationships among Formica subgenera are compatible with this scenario. In this study, we resolve the relationships among the 4 palearctic Formica subgenera (Formica str. s., Coptoformica, Raptiformica and Serviformica) using a phylogenomic dataset of 945 genes for 16 species. Results: We provide a reference tree resolving the relationships among the main Formica subgenera with high bootstrap supports. Discussion: The branching order of our tree suggests that the free-living lifestyle is ancestral in the Formica genus and that parasitic colony founding could have evolved a single time, probably acting as a pre-adaptation to slave-making behaviour. Conclusion: This phylogenetic tree provides a solid backbone for future evolutionary studies in the Formica genus and slave-making behaviour.
Published: 2018
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13. Sub-micron lines patterning into silica using water developable chitosan bioresist films for eco-friendly positive tone e-beam and UV lithography

Author: Chevalier, Celine, CAILLAU, Mathieu, Cremillieu, Pierre, Delair, Thierry, Soppera, Olivier, Leuschel, Benjamin, Ray, Cédric, Moulin, Christophe, Jonin, Christian, Brevet, Pierre-Francois, yeromonahos, christelle, Laurenceau, Emmanuelle, Chevolot, Yann, Leclercq, Jean-Louis, INL - Photovoltaïque (INL - PV), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), INL - Chimie et Nanobiotechnologies (INL - C&N), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux (IMP-LMPB), Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut de Chimie du CNRS (INC), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, and INL - Nanophotonique (INL - Photonique)
Subjects: [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.OTHE]Chemical Sciences/Other, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018

14. A (Triphenylphosphine)Silver (I) Complex as a New Performance Additive in Free-Radical Photopolymerization under Air

Author: Nicolas Bogliotti, Arnaud Brosseau, Davy-Louis Versace, Pauline Sautrot-Ba, Pierre-Emmanuel Mazeran, Jacques Lalevée, Julie Bourgon, Fabrice Morlet-Savary, Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), École normale supérieure - Cachan (ENS Cachan)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie et des Matériaux Paris-Est (ICMPE), Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Roberval (Roberval), Université de Technologie de Compiègne (UTC), Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Polymers and Plastics, General Chemical Engineering, Organic Chemistry, Oxygen inhibition, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Photopolymer, chemistry, Materials Chemistry, [CHIM]Chemical Sciences, Triphenylphosphine, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018
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15. Fabrication of Multimode-Single Mode Polymer Fiber Tweezers for Single Cell Trapping and Identification with Improved Performance

Author: Pedro A. S. Jorge, Olivier Soppera, João Paulo Cunha, Joana S. Paiva, R. S. Rodrigues Ribeiro, Sandra M. Rodrigues, NOVA University of Lisbon, Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0301 basic medicine, Optical fiber, Linear Discriminant Analysis (LDA), Optical Tweezers, Polymers, particle differentiation, Physics::Optics, 02 engineering and technology, lcsh:Chemical technology, Biochemistry, Analytical Chemistry, law.invention, Finite Differences Time Domain (FDTD), law, Yeasts, Tweezers, lcsh:TP1-1185, Fiber, Laser power scaling, Instrumentation, ComputingMilieux_MISCELLANEOUS, Optical Fibers, Lenses, Multi-mode optical fiber, Single-mode optical fiber, beam profile shaping, [CHIM.MATE]Chemical Sciences/Material chemistry, Equipment Design, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, 3. Good health, Optical tweezers, Optoelectronics, optical trapping, Single-Cell Analysis, 0210 nano-technology, Fabrication, Materials science, back-scattering, optical fiber tweezers, Article, 03 medical and health sciences, lorentz force, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Electrical and Electronic Engineering, photo-polymerization, multivariate statistical analysis, business.industry, Lasers, 030104 developmental biology, business
Abstract: Optical fiber tweezers have been gaining prominence in several applications in Biology and Medicine. Due to their outstanding focusing abilities, they are able to trap and manipulate microparticles, including cells, needing any physical contact and with a low degree of invasiveness to the trapped cell. Recently, we proposed a fiber tweezer configuration based on a polymeric micro-lens on the top of a single mode fiber, obtained by a self-guided photopolymerization process. This configuration is able to both trap and identify the target through the analysis of short-term portions of the back-scattered signal. In this paper, we propose a variant of this fabrication method, capable of producing more robust fiber tips, which produce stronger trapping effects on targets by as much as two to ten fold. These novel lenses maintain the capability of distinguish the different classes of trapped particles based on the back-scattered signal. This novel fabrication method consists in the introduction of a multi mode fiber section on the tip of a single mode (SM) fiber. A detailed description of how relevant fabrication parameters such as the length of the multi mode section and the photopolymerization laser power can be tuned for different purposes (e.g., microparticles trapping only, simultaneous trapping and sensing) is also provided, based on both experimental and theoretical evidences.
Published: 2018
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16. Sub-micron lines patterning into silica using water developable chitosan bioresist films for eco-friendly positive tone e-beam and UV lithography

Author: Thierry Delair, Benjamin Leuschel, Christelle Yeromonahos, Pierre Cremillieu, Mathieu Caillau, Cédric Ray, Christian Jonin, Yann Chevolot, Emmanuel Benichou, Céline Chevalier, Emmanuelle Laurenceau, Pierre-François Brevet, Jean-Louis Leclercq, Christophe Moulin, Olivier Soppera, INL - Nanophotonique (INL - Photonique), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Centrale de Lyon (ECL), Université de Lyon, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), INL - Chimie et Nanobiotechnologies (INL - C&N), Université Panthéon-Assas (UP2), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), Ingénierie des Matériaux Polymères (IMP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut Lumière Matière [Villeurbanne] (ILM), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'informatique de l'école normale supérieure (LIENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux (IMP-LMPB), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Laboratoire Hubert Curien [Saint Etienne] (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de rhéologie (LR), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laurenceau, Emmanuelle, Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [CHIM.POLY] Chemical Sciences/Polymers, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Materials science, Green nanotechnology, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, Chitosan, chemistry.chemical_compound, electron beam lithography, biopolymer, law, Etching (microfabrication), etching, green nanotechnology, riboflavin, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, photolithography, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials, [SDV.BBM.BC] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM], Lithography, ComputingMilieux_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, Plasma etching, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, environmentally-friendly, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, 0104 chemical sciences, [SDV.IB.BIO] Life Sciences [q-bio]/Bioengineering/Biomaterials, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Resist, green-tech, chitosan, Photolithography, [CHIM.OTHE]Chemical Sciences/Other, 0210 nano-technology, water developable, Electron-beam lithography
Abstract: International audience; Biopolymers represent natural, renewable and abundant materials. Their use is steadily growing in various areas (food, health, building …) but, in lithography, despite some works, resists, solvents and developers are still oil-based and hazardous chemicals. In this work, we replaced synthetic resist by chitosan, a natural, abundant and hydrophilic polysaccharide. High resolution sub-micron patterns were obtained through chitosan films as water developable, chemically unmodified, positive tone mask resist for an eco-friendly electron beam and deep-UV (193 nm) lithography process. Sub-micron patterns were also successfully obtained using a 248 nm photomasker thanks to the addition of bio-sourced photoactivator, riboflavin. Patterns were then transferred by plasma etching into silica even for high resolution patterns.
Published: 2018
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17. Solution-Based Micro- and Nanoscale Metal Oxide Structures Formed by Direct Patterning for Electro-Optical Applications

Author: Hsiao-Wen Zan, Olivier Soppera, Chun Cheng Yeh, Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: Fabrication, Materials science, Oxide, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, chemistry.chemical_compound, Vacuum deposition, law, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Nanoscopic scale, ComputingMilieux_MISCELLANEOUS, Mechanical Engineering, Transistor, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Isotropic etching, Flexible electronics, 0104 chemical sciences, Transparency (projection), chemistry, Mechanics of Materials, 0210 nano-technology
Abstract: Due to their transparency and tunable electrical, optical, and magnetic properties, metal oxide thin films and structures have many applications in electro-optical devices. In recent years, solution processing combined with direct-patterning techniques such as micro-/nanomolding, inkjet printing, e-jet printing, e-beam writing, and photopatterning has drawn much attention because of the inexpensive and simple fabrication process that avoids using capital-intensive vacuum deposition systems and chemical etching. Furthermore, practical applications of solution direct-patterning techniques with metal oxide structures are demonstrated in thin-film transistors and biochemical sensors on a wide range of substrates. Since direct-patterning techniques enable low-cost fabrication of nanoscale metal oxide structures, these methods are expected to accelerate the development of nanoscale devices and systems based on metal oxide components in important application fields such as flexible electronics, the Internet of Things (IoT), and human health monitoring. Here, a review of the fabrication procedures, advantages, limitations, and applications of the main direct-patterning methods for making metal oxide structures is presented. The goal is to highlight the examples with the most promising perspective from the recent literature.
Published: 2018
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18. Light-Sensitive Alkoxyamines as Versatile Spatially- and Temporally-Controlled Precursors of Alkyl Radicals and Nitroxides

Author: Didier Gigmes, Jason C. Morris, Jacques Lalevée, Fabrice Morlet-Savary, Olivier Soppera, Marc Baron, Jean-Louis Clément, Arnaud Spangenberg, Siham Telitel, Jean-Pierre Malval, Yohann Guillaneuf, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Gigmes, Didier, service de chirurgie, Centre de Lutte Contre le Cancer Henri Becquerel Normandie Rouen (CLCC Henri Becquerel), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse (ENSCMu), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Ecole Nationale Supérieure de Chimie de Mulhouse, and ANR-16-CE08-0020,2PhotonInsight,Compréhension de la polymérisation biphotonique utilisée en écriture laser directe via la combinaison de différentes méthodes d'analyse résolues temporellement et spatialement(2016)
Subjects: Nitroxide mediated radical polymerization, 02 engineering and technology, surfaces, 010402 general chemistry, Photochemistry, chemistry, 01 natural sciences, Biochemistry, Redox, Catalysis, Dissociation (chemistry), on bond homolysis, photo-generated thioaldehydes, chemistry.chemical_compound, Colloid and Surface Chemistry, [CHIM] Chemical Sciences, Moiety, [CHIM]Chemical Sciences, ligation, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, cross-sections, ComputingMilieux_MISCELLANEOUS, Alkyl, polymers, science, chemistry.chemical_classification, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, Polymer, Chromophore, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Pyrene, functionalization, photolabile protecting groups, 0210 nano-technology
Abstract: WOS:000427203600029; International audience; The use of UV/visible light irradiation as a means to initiate organic syntheses is increasingly attractive due to the high spatial and temporal control conferred by photochemical processes. The aim of this work is thus to demonstrate that alkoxyamines bearing a chromophore on the alkyl moiety can provide a photoprotecting group for the sensitive nitroxide functionality, that is known to degrade through redox processes. The dissociation of various photosensitive alkoxyamines was studied from 223 to 298 K under UV/visible irradiation, depending on the nature of the chromophore. In each case a rapid (typically in less than 1 h) and near-quantitative dissociation was observed. As an illustration of the interest of this approach, a pyrene-based alkoxyamine was employed for the spatially controlled coupling of polymer chains onto Si wafers to produce micropatterned surfaces.
Published: 2018
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19. Photoinduced self-assembly of carboxylic acid-terminated lamellar silsesquioxane: highly functional films for attaching and patterning amino-based ligands

Author: Alain Dieterlen, Jocelyne Brendle, Céline Dietlin, Olivier Haeberlé, Abraham Chemtob, Elie Maalouf, Loïc Vidal, Lingli Ni, Céline Croutxé-Barghorn, Séverinne Rigolet, Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Imagerie Microscopique et Traitement d’Images (IMITI - MIPS), Modélisation, Intelligence, Processus et Système (MIPS), Ecole Nationale Supérieure d'Ingénieur Sud Alsace-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar-IUT de Mulhouse-Ecole Nationale Supérieure d'Ingénieur Sud Alsace-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar-IUT de Mulhouse, Laboratoire de Radiobiologie et d'Oncologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Ecole Nationale Supérieure d'Ingénieur Sud Alsace-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-IUT de Colmar-IUT de Mulhouse, Key Laboratory for Palygorskite Science and Applied Technology, Huaiyin Institute of Technology, Ecole Nationale Supérieure de Chimie de Mulhouse (ENSCMu), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))
Subjects: chemistry.chemical_classification, Ligand, General Chemical Engineering, Carboxylic acid, Substrate (chemistry), General Chemistry, Fluorescence, Silsesquioxane, Hydrolysis, chemistry.chemical_compound, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Polymer chemistry, [CHIM]Chemical Sciences, Lamellar structure, Self-assembly
Abstract: International audience; Recently, long n-alkyltrimethoxysilanes (H3C(CH2)nSi(OCH3)3) have proven to self-assemble into mesoscopically ordered passive lamellar films through an efficien t solvent-free photoacid-catalysed sol-gel process. By using an analogue precursor architecture presenting terminal ester group (H3COC(O)(CH2)10Si(OCH3)3), both functional and tuneable nanostructured organosilica films were synthesized, while keeping all processing advantages of light-induced self-assembly. The subsequent attachment of a fluorescent amino-based ligand (Safranin O) was performed using a two-step procedure. The ester end groups were first hydrolysed in reactive carboxylic using standard methods, and activated with an amino ligand to form amide bonds. Hydr olysis and ligand coupling were assessed through infrared and solid-state 1 H NMR spectroscopy. Direct patterning of the fluorescent ligand-functionalized silsesquioxane film was performed by exposure to deep UV under a mask to cause the local degradation o f the dye. The resultant photopatterned film was detected using fluorescence microscopy. This UV method could represent an effective and general approach for attaching and patterning amino-based ligands, with less restriction on substrate and surface preparation than self-assembled monolayers.
Published: 2015
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20. In Situ Generated Ruthenium-Arene Catalyst for Photoactivated Ring-Opening Metathesis Polymerization through Photolatent N-Heterocyclic Carbene Ligand

Author: Thi Kim Hoang Trinh, Sriprapai Songsee, Valérie Héroguez, Patrick Lacroix-Desmazes, Jean-Michel Becht, Abraham Chemtob, Loïc Pichavant, David Sauvanier, Julien Pinaud, Jacques Lalevée, Bassam Tarablsi, Emeline Placet, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Team 1 LCPO : Polymerization Catalyses & Engineering, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), and ANR-16-CE07-0016,PHOTONDROP,Carbènes N-hétérocycliques photolatents pour la polymérisation par ouverture de cycle différée(2016)
Subjects: Tetraphenylborate, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Organic Chemistry, General Chemistry, ROMP, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, Photochemistry, Metathesis, 01 natural sciences, Ring-opening polymerization, Catalysis, 0104 chemical sciences, IMes, chemistry.chemical_compound, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Polymer chemistry, Sodium tetraphenylborate, Ring-opening metathesis polymerisation, Norbornene
Abstract: International audience; 1,3-Bis(mesityl)imidazolium tetraphenylborate (IMesH+ BPh4−) can be synthesized in one step by anion metathesis between the corresponding imidazolium chloride and sodium tetraphenylborate. In the presence of 2-isopropylthioxanthone (sensitizer), an IMes N-heterocyclic carbene (NHC) ligand can be photogenerated under irradiation at 365 nm through coupled electron/proton transfer reactions. By combining this tandem NHC photogenerator system with metathesis inactive [RuCl2(p-cymene)]2 precatalyst, the highly active RuCl2(p-cymene)(IMes) complex can be formed in situ, enabling a complete ring-opening metathesis polymerization (ROMP) of norbornene in the matter of minutes at room temperature. To the best of our knowledge, this is the first example of a photogenerated NHC. Its exploitation in photoROMP has resulted in a simplified process compared to current photocatalysts, because only stable commercial or easily synthesized reagents are required.
Published: 2017
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21. Rapid Prototyping of Polymeric Nanopillars by 3D Direct Laser Writing for Controlling Cell Behavior

Author: Laura Piedad Chia Gomez, Nina Buch-Månson, Jean-Pierre Malval, Arnaud Spangenberg, Karen L. Martinez, Olivier Soppera, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: Rapid prototyping, Fabrication, Nanostructure, Materials science, Biocompatibility, Polymers, Science, [SDV]Life Sciences [q-bio], Cell Culture Techniques, Fluorescent Antibody Technique, Nanotechnology, 02 engineering and technology, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, [SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC], 010402 general chemistry, 01 natural sciences, Article, Mice, Nano, Cell Adhesion, Animals, Microscale chemistry, Cytoskeleton, ComputingMilieux_MISCELLANEOUS, Nanopillar, Cell Proliferation, chemistry.chemical_classification, Multidisciplinary, Lasers, Polymer, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Nanostructures, chemistry, NIH 3T3 Cells, Medicine, 0210 nano-technology
Abstract: Mammalian cells have been widely shown to respond to nano- and microtopography that mimics the extracellular matrix. Synthetic nano- and micron-sized structures are therefore of great interest in the field of tissue engineering, where polymers are particularly attractive due to excellent biocompatibility and versatile fabrication methods. Ordered arrays of polymeric pillars provide a controlled topographical environment to study and manipulate cells, but processing methods are typically either optimized for the nano- or microscale. Here, we demonstrate polymeric nanopillar (NP) fabrication using 3D direct laser writing (3D DLW), which offers a rapid prototyping across both size regimes. The NPs are interfaced with NIH3T3 cells and the effect of tuning geometrical parameters of the NP array is investigated. Cells are found to adhere on a wide range of geometries, but the interface depends on NP density and length. The Cell Interface with Nanostructure Arrays (CINA) model is successfully extended to predict the type of interface formed on different NP geometries, which is found to correlate with the efficiency of cell alignment along the NPs. The combination of the CINA model with the highly versatile 3D DLW fabrication thus holds the promise of improved design of polymeric NP arrays for controlling cell growth.
Published: 2017
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22. Excited-state dynamics of phenol–pyridinium biaryl

Author: Jean-Pierre Malval, Fabrice Morlet-Savary, Emel Ay, Vladimir Kharlanov, Olivier Poizat, Wolfgang Rettig, Vincent Diemer, Hélène Chaumeil, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de Chimie Organique, Bioorganique et Macromoléculaire, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Institute of Physical and Theoretical Chemistry, Humboldt-Universität zu Berlin, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie organique et bioorganique (COB), Humboldt University Of Berlin, and Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010405 organic chemistry, Chemistry, Relaxation (NMR), Solvation, General Physics and Astronomy, Conical intersection, 010402 general chemistry, Photochemistry, 01 natural sciences, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Delocalized electron, chemistry.chemical_compound, Intramolecular force, Excited state, Zwitterion, Physics::Chemical Physics, Physical and Theoretical Chemistry, Ground state
Abstract: The excited-state dynamics of a donor-acceptor phenol-pyridinium biaryl cation was investigated in various solvents by femtosecond transient absorption spectroscopy and temperature dependent steady-state emission measurements. After excitation to a near-planar Franck-Condon delocalized excited S1(DE) state with mesomeric character, three fast relaxation processes are well resolved: solvation, intramolecular rearrangement leading to a twisted charge-shift (CSh) S1 state with localized character, and excited-state proton transfer (ESPT) to the solvent leading to the phenoxide-pyridinium zwitterion. The proton transfer kinetics depends on the proton accepting character of the solvent whereas the interring torsional kinetics depends on the solvent polarity and viscosity. In nitriles, ESPT does not occur and interring twisting arises with no significant intrinsic barrier, but still slower than solvation. The CSh state is notably fluorescent. In alcohols and water, ESPT is faster than the solvation and DE → CSh relaxation processes and yields the zwitterion hot ground state, which strongly quenches the fluorescence. In THF, solvation and interring twisting occur first, leading to the fully relaxed, weakly fluorescent CSh state, followed by slow ESPT towards the zwitterion. At low temperature (77 K), the large viscous barrier of the solvent inhibits the torsional relaxation but ESPT still arises to some extent. Strong emission from the DE geometry and planar zwitterion is thus observed. Finally, quantum chemical calculations were performed on the ground and excited state of model phenol-pyridinium and phenoxide-pyridinium compounds. Strong S1 state energy stabilization is predicted upon twisting in both cases, consistent with a fast relaxation towards the perpendicular geometry. A substantial S0-S1 energy gap is still present for the twisted cationic species, which can explain the long-lived emission of the CSh state in nitriles. A quite different situation arises with the zwitterion for which the S0-S1 energy gap predicted at the twisted geometry is very small. This suggests a close-lying conical intersection and can account for the strong fluorescence quenching observed in solvents where the zwitterion is produced by ESPT.
Published: 2012
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23. Friction and wear properties of hybrid sol–gel nanocomposite coatings against steel: Influence of their intrinsic properties

Author: Abraham Chemtob, Cindy Belon, Sophie Bistac, Céline Croutxé-Barghorn, Marjorie Schmitt, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'innovation moléculaire et applications (LIMA), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Gestion des Risques et Environnement (GRE), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)
Subjects: Diglycidyl ether, Materials science, [SDV]Life Sciences [q-bio], General Physics and Astronomy, 02 engineering and technology, engineering.material, chemistry.chemical_compound, 0203 mechanical engineering, Coating, [CHIM]Chemical Sciences, Composite material, ComputingMilieux_MISCELLANEOUS, Sol-gel, Nanocomposite, Surfaces and Interfaces, General Chemistry, Epoxy, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Surfaces, Coatings and Films, 020303 mechanical engineering & transports, Monomer, Photopolymer, chemistry, visual_art, engineering, visual_art.visual_art_medium, 0210 nano-technology, Tribometer
Abstract: A dual UV-curing process inducing in a single step cationic photopolymerization and a photoinduced sol–gel process was used to obtain novel hybrid coatings. For this, an epoxy resin based on hydrogenated diglycidyl ether bisphenol A was mixed with an epoxy trimethoxysilane precursor (GPTMS, TRIMO) in the presence of photoacid generator based on diaryliodonium salt. Various UV-cured coatings were prepared with different amounts of the hybrid monomer (20 and 50 wt%), and two thicknesses: 15 and 80 μm. The friction and wear properties of these coatings were characterized on a ball-on-disc tribometer (steel ball; applied normal load: 6 N; sliding speed: 5 cm/s). Both the coating thickness and the addition of the hybrid monomer tend to improve the stiffness of the pure epoxy resin; however, these two parameters also induce an increase of the dynamic friction value.
Published: 2011
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24. Direct Laser Writing of Crystallized TiO2 and TiO2 /Carbon Microstructures with Tunable Conductive Properties

Author: Karine Mougin, Shang Yu Yu, Hsiao-Wen Zan, Arnaud Spangenberg, Olivier Soppera, Jean Pierre Malval, Gautier Schrodj, Joseph Dentzer, Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Spangenberg, Arnaud, Compréhension de la polymérisation biphotonique utilisée en écriture laser directe via la combinaison de différentes méthodes d'analyse résolues temporellement et spatialement - - 2PhotonInsight2016 - ANR-16-CE08-0020 - AAPG2016 - VALID, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), National Chiao Tung University (NCTU), ANR, Projet Région Grand Est MIPPI4D, Ministry of Science and Technology, Taiwan (Project 104-2923-E-009-001-MY3), and ANR-16-CE08-0020,2PhotonInsight,Compréhension de la polymérisation biphotonique utilisée en écriture laser directe via la combinaison de différentes méthodes d'analyse résolues temporellement et spatialement(2016)
Subjects: Materials science, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, conductive micropattern, Context (language use), Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, TiO2 / carbon nanocomposite, law.invention, law, [CHIM]Chemical Sciences, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Thin film, ComputingMilieux_MISCELLANEOUS, Microscale chemistry, miniaturized pressure sensor, [CHIM.MATE] Chemical Sciences/Material chemistry, Nanocomposite, Mechanical Engineering, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Laser, Piezoresistive effect, 0104 chemical sciences, Amorphous solid, functional metal oxide, femtosecond direct laser writing, Mechanics of Materials, Femtosecond, 0210 nano-technology
Abstract: International audience; Metal oxides are an important class of materials for optoelectronic applications. In this context, developing simple and versatile processes for integrating these materials at the microscale and nanoscale has become increasingly important. One of the major remaining challenges is to control the microstructuration and electro-optical properties in a single step. It is shown here that near-infrared femtosecond laser irradiation can be successfully used to prepare amorphous or crystallized TiO2 microstructures in a single step using a direct laser writing (DLW) approach from a TiO2 precursor thin film doped with a suitable dye. When laser writing is conducted under a nitrogen atmosphere, simultaneous to the crosslinking of the Tioxide precursor, the graphitization of the organic species embedded in the initial film is observed. In this case, a carbon network is generated within the TiO2 matrix, which significantly increases the conductivity. Moreover, the TiO2/C nanocomposite exhibits piezoresistive behavior that is used in a pressure sensor device. Using this route, it is possible to use DLW to fabricate microsized pressure sensors.
Published: 2018
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25. Rapid prototyping of chemical microsensors based on molecularly imprinted polymers synthesized by two-photon stereolithography

Author: Jean-Pierre Malval, Cédric Ayela, Xuan-Anh Ton, Laura Piedad Chia Gomez, Bernadette Tse Sum Bui, Frank Bokeloh, Olivier Soppera, Karsten Haupt, Damien Thuau, Yannick Fuchs, Arnaud Spangenberg, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Génie Enzymatique et Cellulaire (GEC), Université de Technologie de Compiègne (UTC)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), École normale supérieure - Cachan (ENS Cachan)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), and Département de Photochimie Générale (DPG)
Subjects: Rapid prototyping, Microelectromechanical systems, Materials science, Fabrication, Mechanical Engineering, [SDV]Life Sciences [q-bio], Molecularly imprinted polymer, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, [SPI]Engineering Sciences [physics], Mechanics of Materials, law, [CHIM]Chemical Sciences, General Materials Science, 0210 nano-technology, 3d design, ComputingMilieux_MISCELLANEOUS, Stereolithography
Abstract: International audience; Two-photon stereolithography is used for rapid prototyping of submicrometre molecularly imprinted polymer-based 3D structures. The structures are evaluated as chemical sensing elements and their specific recognition properties for target molecules are confirmed. The 3D design capability is exploited and highlighted through the fabrication of an all-organic molecularly imprinted polymeric microelectromechanical sensor.
Published: 2016
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26. Ultrastable, Uniform, Reproducible, and Highly Sensitive Bimetallic Nanoparticles as Reliable Large Scale SERS Substrates

Author: Safi Jradi, Tayssir Hamieh, Pierre-M. Adam, Mohammad Y. Khaywah, Guy Louarn, Joumana Toufaily, Yvon Lacroute, Département de Photochimie Générale ( DPG ), Université de Haute-Alsace (UHA) Mulhouse - Colmar ( Université de Haute-Alsace (UHA) ) -Centre National de la Recherche Scientifique ( CNRS ), Institut des matériaux Jean Rouxel ( IMN ), Université de Nantes ( UN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Sch Mech & Mat Engn, Pullman, WA 99164 USA, Washington State University ( WSU ), Lebanese University [Beirut], Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Lebanese University [Beirut] (LU), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB)
Subjects: Materials science, Fabrication, [ PHYS.COND.CM-MS ] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Nanoparticle, Nanotechnology, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 01 natural sciences, symbols.namesake, Physical and Theoretical Chemistry, Bimetallic strip, ComputingMilieux_MISCELLANEOUS, Detection limit, chemistry.chemical_classification, Biomolecule, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, General Energy, chemistry, symbols, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, Raman spectroscopy, Localized surface plasmon
Abstract: International audience; A strong interest exists in developing surface-enhanced Raman spectroscopy (SERS) substrates that uniformly enhance Raman signals of chemical and biological molecules over large scales while reaching the detection limit of trace concentrations. Even though the resonant excitation of localized surface plasmons of single or assembled metallic nanoparticles used in SERS substrates can induce large electromagnetic fields, these substrates display a SERS activity which suffers from poor reproducibility, uniformity, and stability, preventing them from being reliable for applications. In this work, we have developed self-supported large scale Ag/Au bimetallic SERS-active substrate with a high density of nanoparticles and uniform hot spots. The resultant substrates are very stable under ambient conditions, providing unchanging Raman enhancement signals even after one year of fabrication, due to the protective Au shell on the bimetallic nanoparticles. The Ag/Au bimetallic substrate exhibits remarkable SERS enhancement for nonresonant molecules, permitting the detection of trace concentrations reaching 10–13 mol/L.
Published: 2015
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27. Lattice modes for aluminum plasmonics

Author: Khlopin, Dmitry, Wardley, William P., Gérard, Davy, Plain, Jerome, Dickson, Wayne, Wurtz, Gregory, Zayats, Anatoliy, Martin, Jérôme, Nano Optics and Near-field spectroscopy Group, King‘s College London, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2015

28. Real time study of hybrid sol-gel photopolymerization by UV light

Author: Céline Croutxé-Barghorn, Christiane Carre, Olivier Soppera, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), and Turck, Colette
Subjects: Materials science, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Biomaterials, Silicon alkoxide, chemistry.chemical_compound, Polymer chemistry, Materials Chemistry, Moiety, Sol-gel, [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Silicate, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Photopolymer, chemistry, Chemical engineering, Polymerization, Ceramics and Composites, 0210 nano-technology, Hybrid material, Photoinitiator
Abstract: Hybrid organic-inorganic materials obtained via sol-gel processing using an organically modified silicon alkoxide have been investigated by liquid 29Si NMR and Real Time Fourier Transformed Infra-Red spectroscopy. Free-radical polymerization was initiated by irradiating the sample under UV-light. Significant structural modifications during irradiation were evident in both the inorganic and organic domains of the hybrid material. It appeared that the degree of condensation of the silicate network was of crucial importance, although the presence of the silicate backbone did not limit the final conversion ratio of the organic polymer. On the contrary, it was found that photopolymerization occurred more efficiently for systems with the higher degree of silicate condensation. The effects of photoinitiator concentration and the functionality of the polymerizable organic moiety on the reaction kinetics were also studied.
Published: 2006
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29. Solvent effect on the radical addition reaction to double bond: Experimental and quantum chemical investigations

Author: Xavier Allonas, Jacques Lalevée, Jean-Pierre Fouassier, Daniel Rinaldi, Jean-Louis Rivail, Manuel F. Ruiz Lopez, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Structure et Réactivité des Systèmes Moléculaires Complexes (SRSMC), and Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chemical, chemistry.chemical_classification, Addition reaction, Work (thermodynamics), solvent effect, Double bond, 010405 organic chemistry, Implicit solvation, General Physics and Astronomy, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Solvent, chemistry, Chemical physics, Computational chemistry, Physical and Theoretical Chemistry, Solvent effects, Quantum
Abstract: Despite the great attention on the factors affecting the radical addition efficiency onto a double bond, the solvent influence remains largely unknown and the subject of discussions. In this Letter, the influence of the solvent is examined both experimentally (by use of a well adapted radical) and by quantum mechanical calculations associated with continuum solvation models. The combination of experimental measurements and theoretical results in this work shows that the solvent polarity represents indeed an important factor affecting the addition reaction. The validity of conclusions obtained by previous calculations carried out in gas phase is also reexamined.
Published: 2005
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30. Mechanical properties of UV-photopolymerizable hybrid sol–gel films investigated by AFM in Pulsed Force Mode

Author: Christiane Carre, Olivier Soppera, Céline Croutxe-Barghorn, Mathieu Feuillade, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), and Turck, Colette
Subjects: [CHIM.POLY] Chemical Sciences/Polymers, [CHIM.MATE] Chemical Sciences/Material chemistry, Nanocomposite, Materials science, Silicon, chemistry.chemical_element, Nanotechnology, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, Adhesion, Tribology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Characterization (materials science), [CHIM.POLY]Chemical Sciences/Polymers, chemistry, General Materials Science, Physical and Theoretical Chemistry, Thin film, 0210 nano-technology, Nanoscopic scale, Sol-gel
Abstract: Pulsed Force Mode was successfully used to investigate hybrid sol–gel films based on organically modified silicon alkoxides. This technique provides, simultaneously to the surface corrugation analysis, a measure of the local mechanical properties of the material (stiffness and adhesion). Such a study of the tribological properties of the material at a nanoscopic scale is of highest interest to investigate the influence of material synthesis parameters on the architecture of the nanocomposite material. In particular, we emphasize on the influence of the irradiation time and the inorganic synthesis parameters on the mechanical properties of the films. The advantages of this technique are multiple: AFM/PFM appears to be well-adapted for the characterization of thin films and the submicronic lateral resolution of the technique opens the door to the study of micro- or nano-patterned hybrid structures.
Published: 2005
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31. Addition of Carbon-Centered Radicals to Double Bonds: Influence of the Alkene Structure

Author: Xavier Allonas, Jean-Pierre Fouassier, Jacques Lalevée, Turck, Colette, Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: chemistry.chemical_classification, [CHIM.MATE] Chemical Sciences/Material chemistry, Addition reaction, Double bond, 010405 organic chemistry, Alkene, Organic Chemistry, Free-radical reaction, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, Photochemistry, 7. Clean energy, 01 natural sciences, 3. Good health, 0104 chemical sciences, chemistry, Polar effect, Molecule, Reactivity (chemistry), Molecular orbital
Abstract: The radical addition reaction to the double bond is well-recognized in organic chemistry as a powerful tool for C-C bond formation. The reactivity of three selected carbon centered radicals (aminoalkyl, methyl, and cyanomethyl) toward five double bonds, also representative of widespread monomers (vinyl ether, vinyl acetate, acrylonitrile, methyl acrylate, and ethylene), was examined in detail by using molecular orbital calculations. The observed reactivity is strongly influenced by the reaction exothermicity demonstrating that the energy barrier is governed in large part by the enthalpy term. The polar effect, as computed by molecular orbital calculations from the transition state structures, can drastically enhance the reactivity. A clear separation and quantification of the relative role of the polar and enthalpy effects in the different radical/double bond systems are obtained and the observed trend of reactivity is discussed. In addition to the effect of the charge-transfer configurations on the barrier, a large influence on the transition state geometry was evidenced.
Published: 2004
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32. Photostabilization of polycarbonate by ZnO coatings

Author: Jean-Luc Gardette, Agnès Rivaton, M. Jacquet, Bénédicte Mailhot, Eric Tomasella, Joël Cellier, A. Moustaghfir, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Clermont-Ferrand (ICCF), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Service Central d'Analyse (SCA), and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Polymers and Plastics, chemistry.chemical_element, coatings, Zinc, photoageing, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Sputtering, Polymer chemistry, Materials Chemistry, Polycarbonate, Photodegradation, Deposition (law), [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, Sputter deposition, Grain size, stabilization, Surfaces, Coatings and Films, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, polycarbonates, visual_art, degrada-tion, visual_art.visual_art_medium, Layer (electronics)
Abstract: The photostability of bisphenol-A polycarbonate (PC) can be increased by depositing zinc oxide (ZnO) coatings onto PC films by radiofrequency (rf) magnetron sputtering using an ArO2 plasma. The photoprotective efficiency increases with the thickness of the ZnO layer and also depends on the sputtering parameters (rf power, total pressure, plasma composition), which control the properties of coatings. The increasing thickness of the deposits is correlated with variations of the density, grain size, and composition. PC samples with ZnO coatings were submitted to artificial accelerated ageing (λ > 300 nm) and the extent of the photodegradation was evaluated by infrared and UV–visible spectroscopies. All the deposition parameters were optimized as a function of the results obtained in photoageing and are described in this article. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 380–385, 2005
Published: 2004
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33. The zinc-loss effect and mobility enhancement of DUV-patterned sol–gel IGZO thin-film transistors

Author: Kuan Hsun Wang, Hsiao-Wen Zan, Olivier Soppera, Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Annealing (metallurgy), chemistry.chemical_element, 02 engineering and technology, Zinc, 01 natural sciences, 0103 physical sciences, Materials Chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Electrical and Electronic Engineering, Gallium, Thin film, ComputingMilieux_MISCELLANEOUS, Sol-gel, 010302 applied physics, Indium gallium zinc oxide, business.industry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, chemistry, Thin-film transistor, Optoelectronics, 0210 nano-technology, business, Indium
Abstract: We investigate the composition of the DUV-patterned sol–gel indium gallium zinc oxide (IGZO) thin-film transistors (TFTs) and observe a significant zinc loss effect during developing when the DUV exposure is insufficient. The zinc loss, however, is beneficial for increasing the mobility. Reducing zinc to indium composition ratio from 0.5 to 0.02 can effectively increase mobility from 0.27 to 7.30 cm2 V–1 s–1 when the gallium to indium ratio is fixed as 0.25 and the post annealing process is fixed as 300 °C for 2 h. On the other hand, an IGO TFT fails to deliver a uniform film and a reproducible TFT performance, revealing the critical role of zinc in forming homogeneous IGZO TFTs.
Published: 2018
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34. Stress birefringence patterning in photopolymer induced by structured illumination

Author: Loic Mager, Christiane Carre, Kokou D. Dorkenoo, Jean-Philippe Bombenger, Alberto Barsella, Gregory Taupier, Groupe d'Optique Non Linéaire et d'Optoélectronique, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Université européenne de Bretagne - European University of Brittany (UEB)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS)-Télécom Bretagne, Université de Rennes (UR)-Université européenne de Bretagne - European University of Brittany (UEB)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS)
Subjects: Diffraction, Materials science, Polarimetry, (050.1940) Diffraction and gratings: Diffraction, (160.4890) Materials: Organic Material, (260.1440) Physical optics: Birefringence, (260.5430) Physical optics: Polarization, 02 engineering and technology, 01 natural sciences, 010309 optics, Inorganic Chemistry, Stress (mechanics), chemistry.chemical_compound, Optics, Polarization, 0103 physical sciences, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Spectroscopy, Shrinkage, Acrylate, Birefringence, business.industry, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Polarization (waves), Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Organic Material, Photopolymer, chemistry, Optoelectronics, 0210 nano-technology, business
Abstract: 4 pages; International audience; We report on the stress birefringence distribution induced by the photopatterning of a multifunctional crosslinkable acrylate monomer sensitized in the visible range. The patterning of this material, prepared in a glass cell of a few tens of microns thickness, is obtained through illumination in a two steps process. The first step is performed using an illumination pattern with a high contrast and a low spatial frequency. The second one is a uniform illumination. The discrepancies in the shrinkage experimented by the material leads to the apparition of patterned stress birefringence revealed through polarimetry and diffraction measurements.
Published: 2013
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35. Nanolithography by plasmon-based free-radical photopolymerization

Author: Olivier Soppera, Claire Deeb, Carole Ecoffet, Renaud Bachelot, Jerome Plain, Alexandre Bouhelier, VU VAN, Jean-Baptiste, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Physics::Optics
Abstract: International audience; An approach recently proposed for controlling photolithography at nanoscale consists of using plasmon resonances in metal nanostructures to confine and enhance optical fields. Plasmonic confinement and enhancement were successfully used to induce a local photopolymerization reaction. Photoinduced processes are of considerable interest for harnessing and controlling polymerization reactions at the nanoscale beyond chemical methods based on surface-confined living polymerization. The approach can be effectively employed for designing hybrid nanostructures with polarization-dependent optical properties, for quantitatively determining local electromagnetic field magnitude, and for developing advanced subwavelength optical lithography techniques. We focus here on the mechanisms responsible for nanoscale photopolymerization induced by confined and enhanced electromagnetic fields. Surface plasmon dipolar resonance of individual Ag nanoparticles was used as an optical near-field source to locally trigger the reaction of a photopolymerizable formulation. We found that the diffusion of the dye is the main process limiting the polymerization reaction, as opposed to what is observed at the microscale with an equivalent chemical system. This approach demonstrates that plasmon-based polymerization can achieve true nanometer scale resolution and also provides a unique opportunity to investigate photochemistry at this length scale.
Published: 2013

36. Cold plasma as environmentally benign approach for activation of zeolite nanocrystals

Author: Svetlana Mintova, Louwanda Lakiss, Frédéric Thibault-Starzyk, Mohamad El Roz, Valentin Valtchev, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Matériaux à Porosité Contrôlée (LMPC), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Ecole Nationale Supérieure de Chimie de Mulhouse-Centre National de la Recherche Scientifique (CNRS), Laboratoire catalyse et spectrochimie (LCS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)
Subjects: Materials science, Thermal desorption spectroscopy, Inorganic chemistry, Infrared spectroscopy, 02 engineering and technology, Nonthermal plasma, 010402 general chemistry, 7. Clean energy, 01 natural sciences, law.invention, Adsorption, law, [CHIM]Chemical Sciences, General Materials Science, Calcination, Zeolite, ComputingMilieux_MISCELLANEOUS, Sorption, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Nanocrystal, 13. Climate action, Mechanics of Materials, 0210 nano-technology
Abstract: The present work deals with the removal of organic template, tetraethylammonium (TEA) and activation of Beta zeolite nanocrystals using cold plasma (nonthermal) treatment as efficient and environmentally benign approach. The entire process of nonthermal plasma activation of the nanosized zeolite is monitored in a reactor using real time in situ FTIR. The influence of the environmentally friendly cold plasma treatment in comparison to conventional activation (heating at high temperature in the presence of reducing gases) on the physicochemical properties of Beta zeolite nanocrystals is investigated. It is shown that the cold plasma treatment removes the organic template from the nanosized Beta crystals within several minutes, without carbon deposition and thus eliminating the high temperature treatment and the use of hazardous chemicals. The acidic properties of the nanosized Beta zeolite after calcination and cold plasma treatment using pyridine adsorption and temperature programmed desorption are studied by in situ IR spectroscopy. In addition, the Beta nanocrystals treated by the two methods are characterized by X-ray diffraction, 29Si NMR spectroscopy and nitrogen sorption. It is shown that the cold plasma treatment is an environmental solution for removal of unwanted products (organic templates) in very short time resulting in energy saving and reduction of hazardous solvents and gases.
Published: 2012
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37. Multi-Shaped Nanoparticles Utilized as Sources of Surface Plasmon for Nanophotopolymerization

Author: Xuan Zhou, Claire Deeb, Davy Gérard, Alexandre Bouhelier, Prashant Jain, Jerome Plain, Olivier Soppera, Sylvie Marguet, Pascal Royer, Gary Wiederrecht, Renaud Bachelot, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), University of Illinois at Urbana-Champaign [Urbana], University of Illinois System, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Laboratoire Edifices Nanométriques (LEDNA), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2012

38. Enhancement of Two-Photon Initiating Efficiency of a 4,4'-Diaminostyryl-2,2'-bipyridine Derivative Promoted by Complexation with Silver Ions

Author: Fabrice Stehlin, Huriye Akdas-Kilig, Olivier Soppera, Arnaud Spangenberg, Nelly Hobeika, Fabrice Morlet-Savary, Jean-Pierre Malval, Jean-Luc Fillaut, Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), École normale supérieure - Cachan (ENS Cachan)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Photomatériaux pour l'Optique et les Nanotechnologies (PHOTON LRC 7228), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Département de Photochimie Générale (DPG), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Polymers and Plastics, Hydrogen, Ligand, Organic Chemistry, Cationic polymerization, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 2,2'-Bipyridine, 0104 chemical sciences, Inorganic Chemistry, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry.chemical_compound, Photopolymer, chemistry, Polymerization, Excited state, Materials Chemistry, Absorption (chemistry), 0210 nano-technology
Abstract: International audience; We report on the two-photon-induced polymerization (TPIP) ability of a new class of free radical two-photon initiator based on a cationic silver(I) complex incorporating 4,4′-diaminostyryl-2,2′-bipyridine (DES) derivatives as ligands. Coordination with Ag+ induces a strong increase of the charge transfer character at excited state, which enhances the two-photon absorption properties of the complex with respect to that of the free ligand. A comparative analysis of the photophysical properties of DES and DES2Ag+ shows that the presence of silver cation increases the efficiency for the generation of radical cations (DES*+), which can be used as hydrogen abstractor in free radical photopolymerization. We show that the addition of an aliphatic amine used as hydrogen donor also opens a parallel route for the regeneration of DES. The improvement of the two-photon polymerization efficiency is then evidenced by the fabrication of microstructures. We finally demonstrate that the use of DES2Ag+ as two-photon initiator offers new opportunities for the fabrication of functional nanostructures composed of metal-polymer nanocomposites.
Published: 2012
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39. The synthesis of tetrahedral bipyridyl metallo-octupoles with large second- and third-order nonlinear optical properties

Author: Hubert Le Bozec, Isabelle Ledoux-Rak, Huriye Akdas-Kilig, Joseph Zyss, Anu Singh, Loïc Toupet, Jean-Pierre Malval, Fabrice Morlet-Savary, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Département de Photochimie Générale, Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Laboratoire de Photonique Quantique et Moléculaire (LPQM), École normale supérieure - Cachan (ENS Cachan)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), CNRS (Centre National de la Recherche Scientifique), Université de Rennes1, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nonlinear optics, Z-scan, General Chemical Engineering, Analytical chemistry, chemistry.chemical_element, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 01 natural sciences, harmonic light scattering, Bipyridine, chemistry.chemical_compound, Z-scan technique, 010405 organic chemistry, Chemistry, Process Chemistry and Technology, Chromophore, Fluorescence, Copper, 0104 chemical sciences, Two-photon emission fluorescence, Crystallography, Absorption (chemistry), Octupolar tetrahedral complexes, Single crystal
Abstract: International audience; Two new 4,4′-bis(donor)-6,6′-diphenyl- 2,2′-bipyridine ligands and their corresponding D2d (CuI, AgI, ZnII) octupolar metal complexes were synthesized, and their linear and nonlinear optical properties were investigated. A single crystal X-ray structure was also determined for the bis[4,4′-bis(diethylaminostyryl)-6,6′-diphenyl-bipyridine]copper(I) complex, which revealed a distorded pseudo-tetrahedral geometry. Molecular second-order nonlinear optical properties were determined for the complexes using the Harmonic Light Scatterring technique at 1.91 μm. These metallo-chromophores display large first hyperpolarizabilities β1.91 in the range of 211-340 × 10−30 esu, which increase with the Lewis acidity of the metal ion. The two-photon absorption properties of the bipyridyl ligands and related complexes were determined using either the two-photon emission method for fluorescent compounds or the open aperture Z-scan technique for non emissive ones. The complexes display red-shifted two-photon absorption bands compared to their metal-ion free chromophores, as well as a large increase of the maximum two-photon absorption cross-sections.
Published: 2012
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40. Metal Nanoparticles Illuminated Out of their Resonance: Direct Visualization of the Surface Charge Spatial Distribution

Author: Claire Deeb, Xuan Zhou, Anne-Laure Baudrion, Safi Jradi, Davy Gérard, Jerome Plain, Alexandre Bouhelier, Olivier Soppera, Jain Prashant, K., Renaud Bachelot, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

41. Nanoscale Signature of Surface Charge Density of Off-Resonance Excited Metal Nanoparticles

Author: Claire Deeb, Xuan Zhou, Davy Gérard, Alexandre Bouhelier, Jain Prashant, K., Jerome Plain, Olivier Soppera, Renaud Bachelot, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

42. Micropointes polymères optiques par photopolymérisation spatialement contrôlée : mécanisme, caractérisations et applications

Author: Jradi, Safi, Soppera, Olivier, Zeng, Xinhua, Renaud-Goud, Philippe, Plain, Jerome, Turck, Colette, Lougnot, Daniel-Joseph, Ecoffet, Carole, Dika, Ihab, Malval, Jean Pierre, Bruyant, Aurélien, Baudin, Pierre, Renault, Mikael, Hadjar, Yassine, Blaize, Sylvain, Bachelot, Renaud, Royer, Pascal, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Nanyang Technological University [Singapour], Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Photomatériaux pour l'Optique et les Nanotechnologies (PHOTON LRC 7228), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Département de Photochimie Générale, Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), VU VAN, Jean-Baptiste, Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

43. Analyse quantitative de plasmons de surface localisés basée sur une approche photochimique

Author: Renaud Bachelot, Claire Deeb, Jerome Plain, Anne-Laure Baudrion, Safi Jradi, Pascal Royer, Olivier Soppera, Alexandre Bouhelier, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), and VU VAN, Jean-Baptiste
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

44. Photo-Structuring Polymer at Sub-Wavelength Scales Using Localized Surface Plasmons of Metal Nanoparticles

Author: Claire Deeb, Jerome Plain, Safi Jradi, Olivier Soppera, Alexandre Bouhelier, Jain Prashant, K., Lebai Huang, Pascal Royer, Renaud Bachelot, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

45. Quantitatively Profiling Nanoparticle Plasmons with Sub-10-nm Resolution by Molecular Molding

Author: Claire Deeb, Jerome Plain, Anne-Laure Baudrion, Safi Jradi, Alexandre Bouhelier, Olivier Soppera, Jain Prashant, K., Huang Libai, Renaud Bachelot, Pascal Royer, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, University of Notre Dame [Indiana] (UND), University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

46. Quantitatively Mapping Localized Surface Plasmons with Sub-10-nm Resolution

Author: Claire Deeb, Jerome Plain, Anne-Laure Baudrion, Safi Jradi, Alexandre Bouhelier, Olivier Soppera, Jain Prashant, K., Lebai Huang, Pascal Royer, Renaud Bachelot, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

47. Probing Near-Field of Silver Nanoparticles Using Photosensitive Molecules

Author: Claire Deeb, Renaud Bachelot, Jerome Plain, Anne-Laure Baudrion, Safi Jradi, Alexandre Bouhelier, Olivier Soppera, Jain Prashant, K., Lebai Huang, Pascal Royer, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Argonne National Laboratory [Lemont] (ANL), Département de Photochimie Générale (DPG), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Miller Institute for Basic Research in Science, University of California [Berkeley], University of California-University of California, University of California [Berkeley] (UC Berkeley), and University of California (UC)-University of California (UC)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2010

48. Photoinduced Coupled Charge and Proton Transfers in Gradually Twisted Phenol−Pyridinium Biaryl Series

Author: Fabrice Morlet-Savary, Christiane Carre, Jean-Pierre Malval, Olivier Poizat., Vincent Diemer, Patrice Jacques, Hélène Chaumeil, Albert Defoin, Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie organique et bioorganique (COB), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS), Departement de Photochimie Générale, Ecole Nationale Supérieure de Chimie de Mulhouse (ENSCMu), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Département de Photochimie Générale (DPG), Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne-Centre National de la Recherche Scientifique (CNRS), Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Photomatériaux pour l'Optique et les Nanotechnologies (PHOTON LRC 7228), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)), Chimie organique et bioorganique (COB), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Ecole Nationale Supérieure de Chimie de Mulhouse-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure de Chimie de Mulhouse, Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Télécom Bretagne, and Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL)
Subjects: Proton, Photochemistry, Pyridinium Compounds, 010402 general chemistry, 01 natural sciences, chemistry.chemical_compound, Phenols, Single bond, Physical and Theoretical Chemistry, Molecular Structure, 010405 organic chemistry, Chemistry, Relaxation (NMR), Solvatochromism, [CHIM.MATE]Chemical Sciences/Material chemistry, 0104 chemical sciences, Spectrometry, Fluorescence, [CHIM.POLY]Chemical Sciences/Polymers, Absorption band, Intramolecular force, Excited state, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Spectrophotometry, Ultraviolet, Pyridinium, Protons
Abstract: A detailed photophysical analysis of a phenol-pyridinium biphenyl series with gradual twisted geometry is presented in this paper. The low-energy CT absorption band of the compounds undergoes a decrease of intensity with a progressive blue shift by increasing the twist angle of the central bond (Theta(AD)). These effects are well described and quantified within the framework of the Mulliken-Murrel approach, which allows us to extend such a model to the charge-shift process. The biaryl compounds exhibit broadened fluorescence bands assigned to the radiative deactivation of a charge shift (CSh) species generated by an intramolecular twisting relaxation of the locally excited (LE) state. Parallel to the rotamerism of the central single bond, excited-state proton-transfer (ESPT) processes are occurring from both excited states and lead to the nonemissive phenolate forms. Solvatochromic shifts of the emission bands are correlated by the Kamlet-Taft parameters (pi*, alpha, and beta). The correlation first confirms the pi* dependence of the CSh band shift but also demonstrates a clear beta dependence. The contribution of the latter parameter to the band hypsochromy is markedly increasing with Theta(AD). Such an unusual effect was ascribed to a much higher ESPT rate relative to the highly twisted conformation with respect to that of more planar geometry. Despite the suppression of the geometrical relaxation in ethanol glass at 77 K, the fluorescence of the phenolate species produced by ESPT from LE state is detected. The relative increase of its fluorescence band intensity with Theta(AD) confirms the gradual enhancement of the excited states acidity.
Published: 2010
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49. Competitive ability not kinship affects growth of Arabidopsis thaliana accessions

Author: Caroline Gouhier-Darimont, Laurent Keller, Frédéric G. Masclaux, Robert L. Hammond, Philippe Reymond, Joël Meunier, Surfaces Cellulaires et Signalisation chez les Végétaux (SCSV), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC), Département d'écologie et évolution [Lausanne] (DEE), Université de Lausanne (UNIL), Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0106 biological sciences, Kin recognition, Physiology, media_common.quotation_subject, [SDV]Life Sciences [q-bio], Arabidopsis, Plant Science, Kin selection, Biology, Genes, Plant, 010603 evolutionary biology, 01 natural sciences, Competition (biology), Intraspecific competition, Arabidopsis/genetics, Arabidopsis/growth & development, Biomass, Ecology, Fruit, Genetic Variation, Genome, Reproduction, Selection, Genetic, Genetic variation, Botany, otorhinolaryngologic diseases, Arabidopsis thaliana, health care economics and organizations, ComputingMilieux_MISCELLANEOUS, media_common, Genetics, [SDV.BA]Life Sciences [q-bio]/Animal biology, social sciences, biology.organism_classification, [SDV.BA.ZI]Life Sciences [q-bio]/Animal biology/Invertebrate Zoology, behavior and behavior mechanisms, population characteristics, Silique, 010606 plant biology & botany
Abstract: In many organisms, individuals behave more altruistically towards relatives than towards unrelated individuals. Here, we conducted a study to determine if the performance of Arabidopsis thaliana is influenced by whether individuals are in competition with kin or non-kin. We selected seven pairs of genetically distinct accessions that originated from local populations throughout Europe. We measured the biomass of one focal plant surrounded by six kin or non-kin neighbours in in vitro growth experiments and counted the number of siliques produced per pot by one focal plant surrounded by four kin or non-kin neighbours. The biomass and number of siliques of a focal plant were not affected by the relatedness of the neighbour. Depending on the accession, a plant performed better or worse in a pure stand than when surrounded by non-kin plants. In addition, whole-genome microarray analyses revealed that there were no genes differentially expressed between kin and non-kin conditions. In conclusion, our study does not provide any evidence for a differential response to kin vs non-kin in A. thaliana. Rather, the outcome of the interaction between kin and non-kin seems to depend on the strength of the competitive abilities of the accessions.
Published: 2010
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50. The worldwide expansion of the Argentine ant

Author: Vogel Valerie, Pedersen Jes S., Giraud Tatiana, Krieger Michael J. B., Keller Laurent, Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS), Ecologie Systématique et Evolution (ESE), Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Université Paris Saclay (COmUE), AgroParisTech, Département de Photochimie Générale (DPG), and Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], Biological invasions, genetic bottlenecks, invasion history, Linepithema humile, social insects, supercolonies, ComputingMilieux_MISCELLANEOUS
Abstract: Aim The aim of this study was to determine the number of successful establishments of the invasive Argentine ant outside native range and to see whether introduced supercolonies have resulted from single or multiple introductions. We also compared the genetic diversity of native versus introduced supercolonies to assess the size of the propagules (i.e. the number of founding individuals) at the origin of the introduced supercolonies. Location Global. Methods We used mitochondrial DNA (mtDNA) markers and microsatellite loci to study 39 supercolonies of the Argentine ant Linepithema humile covering both the native (n = 25) and introduced range (n = 14). Results Data from three mitochondrial genes and 13 nuclear microsatellites suggest that the introduced supercolonies studied originated from at least seven founding events out of the native area in Argentina (primary introductions). The distribution of mtDNA haplotypes also suggests that supercolonies in the introduced range each derive from a single source supercolony and that one of these source supercolonies has been particularly successful, being the basis of many introduced populations spread across the world. Comparison of the genetic diversity of supercolonies based on the five most diverse loci also revealed that native and introduced supercolonies have greatly overlapping ranges of diversity, although the genetic diversity is on average less in introduced than in native supercolonies. Main conclusions Both primary introductions (from the native range) and secondary introductions (from sites with established invasive supercolonies) were important in the global expansion of the Argentine ant. In combination with the similar social organization of colonies in the native and introduced range, this indicates that invasiveness did not evolve recently as a unique and historically contingent event (e.g. reduction of genetic diversity) in this species. Rather, native L. humile supercolonies have characteristics that make them pre-adapted to invade new - and in particular disturbed - habitats when given the opportunity. These results have important implications with regard to possible strategies to be used to control invasive ants.
Published: 2010
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