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40 results on '"ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010)"'

1. Non-destructive depth-dependent morphological characterization of ferroelectric:semiconducting polymer blend films

Author: Mario Maglione, Georges Hadziioannou, Eleni Pavlopoulou, N. Spampinato, Gilles Pecastaings, Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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)-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), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), The authors acknowledge receiving funding from the Labex AMADEus (ANR-10-LABEX-0042-AMADEUS) and the French state Initiative d’Excellence IdEx (ANR-10-IDEX-003-02). Financial support from the HOMERIC Industrial Chair (Arkema/ANR) with the grant agreement no AC-2013-365 is also acknowledged., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: non-volatile memories Declarations, Materials science, Polymers and Plastics, scanning probe microscopy, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 01 natural sciences, P3HT, Scanning probe microscopy, Colloid and Surface Chemistry, morphology, Microscopy, Materials Chemistry, Physical and Theoretical Chemistry, Composite material, Thin film, Kelvin probe force microscope, [CHIM.MATE]Chemical Sciences/Material chemistry, P(VDF-co-TrFE), 021001 nanoscience & nanotechnology, 0104 chemical sciences, Piezoresponse force microscopy, Polymer blend, 0210 nano-technology, Layer (electronics), polymer blends
Abstract: International audience; Herein we investigate the technologically relevant blend of the ferroelectric polymer poly(vinylidene fluorideco-trifluoroethylene), P(VDF-co-TrFE), with the semiconducting polymer poly(3-hexylthiophene), P3HT, by means of a combination of Scanning Probe Microscopy techniques, namely Atomic Force Microscopy, Conductive Force Microscopy, Kelvin Probe Force Microscopy and Piezoresponse Force Microscopy. This combination proves to be a powerful tool for the non-destructive morphological reconstruction of multifunctional nano-structured thin films, as those under study. Each modality allows discerning the two blend constituents based on their functionality, and, additionally, probes layers of different thickness with respect to the films surface. The depth-dependent information that is collected allows a qualitative reconstruction of the blend's composition and morphology both in-plane and out-of-plane of the film. We demonstrate that P3HT exhibits the tendency to reside the film surface at an almost constant composition of 15%, independent of blend's composition. Increasing the P3HT content in the blend results in the segregation of P3HT at the upper layers of the films, partially buried below a P(VDF-co-TrFE) superficial layer. The depletion of P3HT from the substrate/film interface is reflected by the poor existence of conducting pathways that connect the top and bottom planes of the film. The three-dimensional morphology of this polymer blend that is revealed thanks to the employed techniques deviates substantially from the ideal morphology proposed for the efficient performance of the targeted memory devices.
Published: 2021
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2. Multiscale modelling of diffusion and enzymatic reaction in porous electrodes in Direct Electron Transfer mode

Author: Cristina Carucci, Didier Lasseux, Sébastien Gounel, Alexander Kuhn, Tatjana Šafarik, Lin Zhang, Sabrina Bichon, Tien Dung Le, Francesca Lorenzutti, Nicolas Mano, Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-17-CE08-0005,MOMA,Modélisation d'électrodes poreuses pour leur conception optimisée(2017), ANR-16-CE19-0001,BIO3,Electrodes poreuses biocompatibles et biofonctionnelles pour des biopiles enzymatiques miniaturisées(2016), European Project: 8813006(1988), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), and Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Work (thermodynamics), Materials science, General Chemical Engineering, Volume averaging method, Thermodynamics, 02 engineering and technology, engineering.material, 010402 general chemistry, 01 natural sciences, Industrial and Manufacturing Engineering, Electron transfer, [CHIM.GENI]Chemical Sciences/Chemical engineering, Coating, Diffusion reaction, Direct Electron Transfer, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Diffusion (business), Porosity, Bilirubin oxidase, Voltammetry, Bilirubin Oxidase, Applied Mathematics, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, Porous electrode, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Electrode, engineering, 0210 nano-technology
Abstract: This work is dedicated to a multi-scale modelling of coupled diffusion and reaction in a porous microelectrode operating in the Direct Electron Transfer mode. The pore-scale physico-electrochemical unsteady model is developed considering the oxygen reduction, catalyzed by an enzyme coating the pores of the electrode, coupled to the diffusion of oxygen and mass balance of enzymes. This model is formally upscaled to obtain an original closed unsteady macroscopic model operating at the electrode scale, together with the associated closure providing the effective diffusivity tensor. A validation of this model is carried out from a comparison with the solution of the initial 3D pore-scale governing equations considering the bilirubin oxydase as the catalyst. The relevance and accuracy of the macroscale model are proved allowing a considerable simulation speedup. It is further employed to successfully predict experimental voltammetry results obtained with porous gold electrodes functionnalized with a bilirubin oxidase mutant (BOD S362C). This model represents a breakthrough by providing an operational simple way of understanding and further optimizing porous electrodes functioning in DET mode.
Published: 2022
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3. Local enhancement of hydrogen production by the hydrolysis of Mg17Al12 with Mg 'model' material

Author: J.-L. Bobet, Michel Nakhl, D. Zigah, E.D. Farias, M. Zakhour, S. Al Bacha, P. Garrigue, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Lavoisier de Versailles (ILV), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Libanaise, Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This work was financially supported by the AZM & SAADE Association the Lebanese University (Scientific research support program) and Bordeaux Foundation. This work was partially funded and performed within the framework of the Labex AMADEUX ANR-10-LABEX-0042-AMADEUS with the help of the French State Initiative d′Excellence IdEx ANR-10-IDEX-003-02., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Mg17Al12, 020209 energy, Mg, 02 engineering and technology, Galvanic coupling, law.invention, Corrosion, Scanning electrochemical microscopy, Electron transfer, law, 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, Galvanic cell, 050207 economics, Hydrogen production, Mechanical Engineering, 05 social sciences, Metals and Alloys, [CHIM.MATE]Chemical Sciences/Material chemistry, Microstructure, Cathode, Anode, Chemical engineering, Mechanics of Materials, SECM
Abstract: International audience; The effect of galvanic coupling on the corrosion behavior of Mg and Mg17Al12 in Mg-Al alloys was studied by Scanning ElectroChemical Microscopy (SECM). The effect of galvanic coupling between Mg and Mg17Al12 was investigated using a “model” Mg+Mg17Al12 material with a controlled microstructure to evaluate the hydrogen evolution at a micrometric scale. SECM maps revealed that galvanic coupling between Mg and Mg17Al12 accelerates the corrosion rate (formation of a thicker passive layer) of both components. Mg17Al12 acts controversially to a conventional cathode in galvanic system since hydrogen production by its hydrolysis reaction was found to increase due to the electron transfer with the anode (Mg).
Published: 2022
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4. Engineering block copolymer materials for patterning ultra-low dimensions

Author: Guillaume Fleury, Daniele Mantione, Cian Cummins, Guillaume Pino, 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), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), European Project: MSCA-IF-2018 #838171,TEXTHIOL, Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Silicon, Biomedical Engineering, Energy Engineering and Power Technology, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Industrial and Manufacturing Engineering, Nanomanufacturing, Materials Chemistry, Copolymer, Chemical Engineering (miscellaneous), Thin film, Scaling, Lithography, Process Chemistry and Technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Nanolithography, chemistry, Polymerization, Chemistry (miscellaneous), 0210 nano-technology
Abstract: International audience; The landscape of block copolymer (BCP) lithographic patterning has evolved significantly from the early days of the first generation BCP material, poly(styrene)-block-poly(methyl methacrylate) (PS-b-PMMA). The low Flory–Huggins interaction parameter (χ) of the workhorse material PS-b-PMMA prevents ultra-low dimensional scaling (
Published: 2020
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5. Polyhedral plasmonic nanoclusters through multi-step colloidal chemistry

Author: Etienne Duguet, Cyril Chomette, Nicholas Schade, Serge Ravaine, Vinothan N. Manoharan, Mona Tréguer-Delapierre, Nabila Tanjeem, Harvard University [Cambridge], Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Physics, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This work was supported by the LabEx AMADEus (ANR-10-LABX-42) and IdEx Bordeaux (ANR-10-IDEX-03-02), that is, the Investissements d’Avenir programme of the French government managed by the Agence Nationale de la Recherche. The research was partially supported by the National Science Foundation through the Harvard University Materials Research Science and Engineering Center under grant number DMR-2011754. This work was performed in part at the Center for Nanoscale Systems (CNS), a member of the National Nanotechnology Coordinated Infrastructure Network (NNCI), which is supported by the National Science Foundation under NSF award no. 1541959. CNS is part of Harvard University., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Process Chemistry and Technology, Interface and colloid science, Dispersity, Emulsion polymerization, Nanotechnology, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, Dielectric, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Nanoclusters, chemistry.chemical_compound, chemistry, Mechanics of Materials, Cluster (physics), General Materials Science, Polystyrene, Electrical and Electronic Engineering, 0210 nano-technology, Plasmon
Abstract: International audience; We describe a new approach to making plasmonic metamolecules with well-controlled resonances at optical wavelengths. Metamolecules are highly symmetric, subwavelength-scale clusters of metal and dielectric. They are of interest for metafluids, isotropic optical materials with applications in imaging and optical communications. For such applications, the morphology must be precisely controlled: the optical response is sensitive to nanometer-scale variations in the thickness of metal coatings and the distances between metal surfaces. To achieve this precision, we use a multi-step colloidal synthesis approach. Starting from highly monodisperse silica seeds, we grow octahedral clusters of polystyrene spheres using seeded-growth emulsion polymerization. We then overgrow the silica and remove the polystyrene to create a dimpled template. Finally, we attach six silica satellites to the template and coat them with gold. Using single-cluster spectroscopy, we show that the plasmonic resonances are reproducible from cluster to cluster. By comparing the spectra to theory, we show that the multi-step synthesis approach can control the distances between metallic surfaces to nanometer-scale precision. More broadly, our approach shows how metamolecules can be produced in bulk by combining different, high-yield colloidal synthesis steps, analogous to how small molecules are produced by multi-step chemical reactions.
Published: 2021
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6. Versatile template-directed synthesis of gold nanocages with a predefined number of windows

Author: Fabrice Vallée, Ovidiu Ersen, Etienne Duguet, Fabien Vialla, Anna Lombardi, Serge Ravaine, Alexandra Madeira, Cyril Chomette, Aurélien Crut, Ileana Florea, Jérôme Majimel, Dris Ihiawakrim, Adeline Perro, Etienne Pertreux, Anthony Désert, Céline Hubert, Natalia Del Fatti, Paolo Maioli, Mona Tréguer-Delapierre, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-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)-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), FemtoNanoOptics (FemtoNanoOptics), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, STEM-EDX analyses were performed at the Plateforme Aquitaine de Caractérisation des Matériaux and Bordeaux Imaging Center of the University of Bordeaux. This work was supported by the Conseil Régional d’Aquitaine, the Agence Nationale de la Recherche (grant ANR-07-BLAN-0271 and ANR-BLAN-SIMI10-LS-100617-15-01), and the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), i.e. the Investissements d’Avenir programme of the French government. The authors acknowledge Dr Véronique Many for some parallel experiments, Dr Laurent Adumeau and Dr Stéphane Mornet for helpful discussion, and Dr Yohan Grand for SEM experiments performed at ITODYS laboratory (UMR 7086, Univ. Paris Diderot)., ANR-07-BLAN-0271,Towards colloïd,Towards Colloidal Molecules and Functional Materials(2007), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-10-BLAN-1008,UNIT3D,Nanoparticule hybride unique: synthèse et corrélation entre sa réponse optique et sa caractérisation par microscopie électronique analytique en 3D.(2010), Toulin, Stéphane, Blanc - Towards Colloidal Molecules and Functional Materials - - Towards colloïd2007 - ANR-07-BLAN-0271 - BLANC - VALID, Advanced Materials by Design - - AMADEus2010 - ANR-10-LABX-0042 - LABX - VALID, Initiative d'excellence de l'Université de Bordeaux - - IDEX BORDEAUX2010 - ANR-10-IDEX-0003 - IDEX - VALID, BLANC - Nanoparticule hybride unique: synthèse et corrélation entre sa réponse optique et sa caractérisation par microscopie électronique analytique en 3D. - - UNIT3D2010 - ANR-10-BLAN-1008 - BLANC - VALID, Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-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)-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)-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 Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)
Subjects: [CHIM.MATE] Chemical Sciences/Material chemistry, Nanostructure, Fabrication, Materials science, Nanotechnology, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Spatial modulation, 0104 chemical sciences, chemistry.chemical_compound, Template, Nanocages, chemistry, Etching, Particle, General Materials Science, Polystyrene, 0210 nano-technology
Abstract: International audience; Highly symmetrical gold nanocages can be produced with a controllable number of circular windows of either 2, 3, 4, 6 or 12 via an original fabrication route. The synthetic pathway includes three main stages: the synthesis of silica/polystyrene multipod templates, the regioselective seeded growth of a gold shell on the unmasked part of the silica surface and the development of gold nanocages by dissolving/etching the templates. Electron microscopy and tomography provide evidence of the symmetrical features of the as-obtained nanostructures. The optical properties of nanocages with 4 and 12 windows were measured at the single particle level by spatial modulation spectroscopy and correlated with numerical simulations based on finite-element modeling. The new multi-step synthesis approach reported here also allows the synthesis of rattle-like nanostructures through filling of the nanocages with a guest nano-object. With the potential to adjust the chemical composition, size and geometry of both the guest particle and the host cage, it opens new routes towards the fabrication of hollow nanostructures of high interest for a variety of applications including sensing devices, catalytic reactors and biomedicine. New concepts We demonstrate a new concept for making hollow nanoscale structures which are central to the advances in many current and emerging areas of technology. Nanocages are hollow and porous nanostructures. The ones made of metal are needed for optics, catalysis, biomedicine, and sensing. But, they are difficult to make. In particular, it is difficult to yield precise nanoscale control of the porosity as well as the composition. We address this challenge by combining inorganic colloidal synthesis and metal deposition on biphasic sacrificial templates. The single-particle spectroscopy and simulation confirm that our approach affords tight control over the morphology and porosity at the nanoscale. Previous approaches to making metal nanocages rely on galvanic replacement reactions and siteselective deposition. They offer control over morphology, but limited control over composition, porosity and scaleup. Our approach provides a simple and general strategy to circumvent these issues. It can be applied to a wide range of materials, and with further developement to any nanorattle-like nanostructures.
Published: 2021
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7. Broadband forward light scattering by architectural design of core–shell silicon particles

Author: Cyril Aymonier, Philippe Barois, Brian A. Korgel, Sabrina Lacomme, Glenna L. Drisko, Alexandre Baron, Taizhi Jiang, Yuebing Zheng, Jie Fang, Maria Letizia De Marco, Teulet, Nadine, Advanced Materials by Design - - AMADEus2010 - ANR-10-LABX-0042 - LABX - VALID, Initiative d'excellence de l'Université de Bordeaux - - IDEX BORDEAUX2010 - ANR-10-IDEX-0003 - IDEX - VALID, Développment d'une infrastructure française distribuée coordonnée - - France-BioImaging2010 - ANR-10-INBS-0004 - INBS - VALID, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), McKetta Department of Chemical Engineering, University of Texas, Walker Department of Chemical Engineering, Bordeaux Imaging Center (BIC), Université de Bordeaux (UB)-Institut François Magendie-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), i.e., the Investissements d'Avenir program of the French government managed by the Agence Nationale de la Recherche. The Robert A. Welch Foundation (F-1464) and the National Science Foundation through the Center for Dynamics and Control of Materials, an NSF MRSEC under Cooperative Agreement No. DMR-1720595. J.F. and the financial support of the National Science Foundation (NSF-ECCS-2001650), and the National Institute of General Medical Sciences of the National Institutes of Health (DP2GM128446)., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), and Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut François Magendie-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Silicon oxynitride, directional light scattering, Silicon, Mie scattering, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Light scattering, Biomaterials, chemistry.chemical_compound, Visible light silicon resonators, Electrochemistry, [CHIM.MATE] Chemical Sciences/Material chemistry, business.industry, Scattering, Metamaterial, Huygens sources, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Dipole, core-shell, chemistry, Optoelectronics, 0210 nano-technology, business, Magnetic dipole
Abstract: International audience; A goal in the field of nanoscale optics is the fabrication of nanostructures with strong directional light scattering at visible frequencies. Here, we demonstrate the synthesis of Mie-resonant coreshell particles with overlapping electric and magnetic dipole resonances in the visible spectrum. The core consists of silicon surrounded by a lower index silicon oxynitride (SiOxNy) shell with an adjustable thickness. Optical spectroscopies coupled to Mie theory calculations give the first experimental evidence that the relative position and intensity of the magnetic and electric dipole resonances are tuned by changing the core-shell architecture. Specifically, coating a high-index particle with a low-index shell coalesces the dipoles, while maintaining a high scattering efficiency, thus generating broadband forward scattering. This synthetic strategy opens a route towards metamaterial fabrication with unprecedented control over visible light manipulation.
Published: 2021
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8. Seeded growth of ultrathin gold nanoshells using polymer additives and microwave radiation

Author: Thierry Le Mercier, Laurent Lermusiaux, Valérie Buissette, Marie Plissonneau, Etienne Duguet, Mona Tréguer-Delapierre, Glenna L. Drisko, Laure Bertry, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Solvay (France), This work was jointly supported by the Solvay company and the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), i.e. the Investissements d’Avenir program of the French government managed by the Agence Nationale de la Recherche. GLD is supported by a project that has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 948319)., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Science, Shell (structure), 02 engineering and technology, Thermal treatment, engineering.material, 010402 general chemistry, 01 natural sciences, Article, Coating, medicine, Surface plasmon resonance, chemistry.chemical_classification, Multidisciplinary, Polyvinylpyrrolidone, Synthesis and processing, Polymer, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Nanoshell, 0104 chemical sciences, Chemical engineering, chemistry, engineering, Medicine, Particle, Nanoparticles, 0210 nano-technology, [CHIM.RADIO]Chemical Sciences/Radiochemistry, medicine.drug
Abstract: Nanoshells made of a silica core and a gold shell possess an optical response that is sensitive to nanometer-scale variations in shell thickness. The exponential red shift of the plasmon resonance with decreasing shell thickness makes ultrathin nanoshells (less than 10 nm) particularly interesting for broad and tuneable ranges of optical properties. Nanoshells are generally synthesised by coating gold onto seed-covered silica particles, producing continuous shells with a lower limit of 15 nm, due to an inhomogeneous droplet formation on the silica surface during the seed regrowth. In this paper, we investigate the effects of three variations of the synthesis protocol to favour ultrathin nanoshells: seed density, polymer additives and microwave treatment. We first maximised gold seed density around the silica core, but surprisingly its effect is limited. However, we found that the addition of polyvinylpyrrolidone during the shell synthesis leads to higher homogeneity and a thinner shell and that a post-synthetic thermal treatment using microwaves can further smooth the particle surface. This study brings new insights into the synthesis of metallic nanoshells, pushing the limits of ultrathin shell synthesis.
Published: 2021
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9. Large area Al2O3-Au raspberry-like nanoclusters from iterative block-copolymer self-assembly

Author: Guillaume Fleury, Philippe Fontaine, Cian Cummins, Georges Hadziioannou, Virginie Ponsinet, Alberto Alvarez-Fernandez, Frédéric Nallet, Philippe Barois, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), 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), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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), University College of London [London] (UCL), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), EconomiX, Université Paris Nanterre (UPN)-Centre National de la Recherche Scientifique (CNRS), and Université de Bordeaux (UB)
Subjects: [PHYS]Physics [physics], Materials science, General Chemical Engineering, Nanotechnology, 02 engineering and technology, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Nanoclusters, Nanomaterials, [CHIM.POLY]Chemical Sciences/Polymers, Monolayer, Wafer, Nanodot, Self-assembly, Thin film, 0210 nano-technology, Lithography
Abstract: International audience; In the field of functional nanomaterials, core-satellite nanocluster have recently elicited great interest due to their unique optoelectronic properties. However, core-satellite synthetic routes to date are hampered by delicate and multistep reaction conditions and no practical method has been reported for the ordering of these structures onto a surface monolayer. Herein we show a reproducible and simplified thin film process to fabricate bimetallic raspberry nanoclusters using block copolymer (BCP) lithography. Inorganic raspberry nanoclusters fabricated consisted of a ~ 36 nm alumina core decorated with ~15 nm Au satellites after infusing multilayer BCP nanopatterns. A series of cylindrical BCPs with different molecular weights allowed us to dial in specific nanodot periodicities (from 30 to 80 nm). Highly ordered BCP nanopatterns were then selectively infiltrated with alumina and Au species to develop multi-level bimetallic raspberry features. Microscopy and x-ray reflectivity analysis were used at each fabrication step to gain further mechanistic insights and understand the infiltration process. Furthermore, grazing-incidence small-angle X-ray scattering studies of infiltrated films confirmed the excellent order and vertical orientation over wafer scale areas of Al2O3/Au raspberry nanoclusters. We believe our work demonstrates a robust strategy towards designing hybrid nanoclusters since BCP blocks can be infiltrated with various low cost salt-based precursors. The highly controlled nanocluster strategy disclosed here could have wide ranging uses, in particular for metasurface and optical based sensor applications.
Published: 2020
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10. Storage moduli and porosity of soft PDMS polyMIPEs can be controlled independently using thiol-ene click chemistry

Author: Thomas Brunet, Gregory Beaucage, Tucker J. McKenzie, Neil Ayres, Raj Kumar, Paul S. Heaton, Kabir Rishi, Olivier Mondain-Monval, Department of Chemistry [Cincinnati], University of Cincinnati (UC), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), and ANR-15-CE08-0024,BRENNUS,Revêtements fonctionnels acoustiques à base de Métamatériaux souples(2015)
Subjects: chemistry.chemical_classification, Materials science, Polymers and Plastics, Biocompatibility, Organic Chemistry, 02 engineering and technology, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, Elastomer, 01 natural sciences, 0104 chemical sciences, Inorganic Chemistry, Shear modulus, [CHIM.POLY]Chemical Sciences/Polymers, Chemical engineering, chemistry, Emulsion, Materials Chemistry, Thermal stability, 0210 nano-technology, Porosity, Porous medium
Abstract: International audience; Porous elastomeric polymers have been used in a wide range of applications because of their unique characteristics such as biocompatibility,gas permeability, thermal stability, and hydrophobic and dielectric properties. Poly(dimethyl siloxane) (PDMS), a commercially availableelastomer, has also been shown to exhibit specific acoustic properties. However, the material properties were limited because of a lack of control over the chemistry used to prepare the cross-linked PDMS elastomer. Here, the synthesis of PDMS-based polymerized medium internal-phase emulsions (polyMIPEs) with tunable storage shear moduli (G′) has been performed using macromolecular thiol−ene reactions. Storage shear modulus values from ∼38 to ∼330 kPa were achieved by changing the stoichiometric ratio of the thiol-to-ene-functionalized PDMS, whereas the porosity of the polyMIPEs was controlled by the volume of the aqueous phase used in the emulsion formulation. Very low sound velocities (∼40 m/s) through the porous materials were recorded using acoustic characterization. Therefore, this work provides an example of the synthesis of soft polyMIPEs with possible applications as acoustic materials.
Published: 2020
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11. Flat acoustics with soft gradient-index metasurfaces

Author: Olivier Poncelet, Raj Kumar, Thomas Brunet, Yabin Jin, Olivier Mondain-Monval, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), ANR: ANR-10-LABEX-0042-AMADEUS,Labex AMADEUS, ANR-10-IDEX-0003-02/10-IDEX-0003,IDEX BORDEAUX,IdEx Bordeaux(2010), ANR-15-CE08-0024,BRENNUS,Revêtements fonctionnels acoustiques à base de Métamatériaux souples(2015), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: 0301 basic medicine, Fabrication, Materials science, Acoustics and Ultrasonics, Acoustics, Science, Beam steering, General Physics and Astronomy, Physics::Optics, 02 engineering and technology, 01 natural sciences, Article, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Matrix (mathematics), Planar, 0302 clinical medicine, Arts and Humanities (miscellaneous), Speed of sound, Broadband, 0103 physical sciences, Soft matter, lcsh:Science, 030223 otorhinolaryngology, Porosity, 010301 acoustics, Wavefront, chemistry.chemical_classification, Multidisciplinary, Metamaterial, General Chemistry, Polymer, Acoustic wave, 021001 nanoscience & nanotechnology, metasurfaces, Characterization (materials science), 030104 developmental biology, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Flat acoustics, Ultrasonic sensor, lcsh:Q, Development (differential geometry), 0210 nano-technology, Beam (structure)
Abstract: Recently, metasurfaces have been proven to be effective and compact devices for the design of arbitrary wavefronts. Metasurfaces are planar metamaterials with a subwavelength thickness that allows wavefront shaping by introducing in-plane variations, namely, gradients, in the spatial wave response of these flat structures. Here we report a new class of acoustic gradient-index (GRIN) metasurfaces engineered from soft graded-porous silicone rubber with a high acoustic index for broadband ultrasonic three-dimensional wavefront shaping in water. The functionalities of these soft flat lenses are illustrated through various experiments, which demonstrate beam steering and beam focusing, as well as vortex beam generation in free space. These new GRIN metasurfaces may have important applications in various domains using designed ultrasonic fields (biomedical imaging, industrial non-destructive testing, contactless particle manipulation), since their fabrication is very straightforward with common polymer science engineering., Here, the authors report an approach for creating various acoustic wavefronts in free space by using soft gradient-index porous metasurfaces. These flat lenses generate steered planar, focused spherical and helical ultrasonic beams in water by manipulating the spatial distribution of the material porosity.
Published: 2019

12. High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films

Author: Alberto Alvarez-Fernandez, Virginie Ponsinet, Guillaume Fleury, Georges Hadziioannou, Gilles Pecastaings, Karim Aissou, 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), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Nanoplasmonics, Materials science, Fabrication, Nanophotonics, Physics::Optics, High refractive index, Bioengineering, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Microscopy, General Materials Science, Thin film, chemistry.chemical_classification, business.industry, Scattering, High-refractive-index polymer, General Engineering, General Chemistry, Polymer, 021001 nanoscience & nanotechnology, Block copolymers, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Optoelectronics, 0210 nano-technology, business, Refractive index
Abstract: International audience; Materials with a high and tunable refractive index are attractive for nanophotonic applications. In this contribution, we propose a straightforward fabrication technique of high-refractive index surfaces based on self-assembled nanostructured block copolymer thin films. The selective and customizable metal incorporation within out-of-plane polymer lamellae produces azimuthally isotropic metallic nanostructures of defined geometries, which were analysed using microscopy and small-angle X-ray scattering techniques. Variable-angle spectroscopic ellipsometry was used to relate the geometrical parameters of the metallic features and the resulting refractive index of the patterned surfaces. In particular, nanostructured gold patterns with a high degree of homogeneity and a gold content as low as 16 vol% reach a refractive index value of more than 3 in the visible domain. Our study thus demonstrates a new route for the preparation of high refractive index surfaces with a low metal content for optical applications.
Published: 2019
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13. Recent advances in high surface area electrodes for bioelectrochemical applications

Author: Nicolas Mano, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE19-0001,BIO3,Electrodes poreuses biocompatibles et biofonctionnelles pour des biopiles enzymatiques miniaturisées(2016), ANR-17-CE08-0005,MOMA,Modélisation d'électrodes poreuses pour leur conception optimisée(2017), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Flexibility (engineering), Electrode material, Materials science, High surface area electrodes, Modeling, Nanotechnology, 02 engineering and technology, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Biofuel cells, 0104 chemical sciences, Analytical Chemistry, Bioelectrochemical applications, Biosensors, Porous electrode, Electrode, Electrochemistry, High surface area, 0210 nano-technology
Abstract: International audience; The search for high surface area electrodes for bioelectrochemical applications is becoming more intense. In the last few years, new strategies have emerged to develop threedimensional electrode materials with very well controlled architecture providing at the same time high specific surface, bendability and flexibility. This review will highlight some of the recent work published in the last 2 years and will discuss the issue of mathematical modeling of porous electrodes and what could be the future of high surface area electrodes materials
Published: 2020
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14. Clustering of asymmetric dumbbell-shaped silica/polystyrene nanoparticles by solvent-induced self-assembly

Author: Serge Ravaine, Etienne Duguet, Weiya Li, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-15-CE09-0010,ENLARgER,Dilater le système atomique conventionnel à l'échelle colloïdale grâce à des particules préprogrammées pour une valence donnée(2015), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Nanoparticle, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, silica/polystyrene nanoparticles, Biomaterials, chemistry.chemical_compound, Colloid and Surface Chemistry, gold-decorated silica clusters, Cluster analysis, patch-to- particle size ratio, Aggregation number, Patch-to-particle size ratio, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Solvent, Chemical engineering, chemistry, Transmission electron microscopy, Molar mass distribution, Self-assembly, Polystyrene, 0210 nano-technology, solvent-induced assembly
Abstract: International audience; We report a quite simple strategy to assemble silica/polystyrene dumbbell-shaped nanoparticles into clusters with an aggregation number from two to more than 30. The polystyrene lobe serves as a patch that is made sticky and ready to merge with similar ones when the dumbbells are dispersed in an ethanol/DMF mixture. Thanks to transmission electron microscopy experiments, we describe qualitativelyand quantitatively the influence of several experimental parameters such as the solvent quality, i.e. DMF fraction, and the patch-to-particle size ratio. We show that the DMF fraction range (30–50 vol%) for the sticky regime can be extended if the incubation process is completed by a centrifugation step.We also demonstrate an unexpected evolution in the average aggregation number with the patch-toparticle size ratio that may be explained by the molar mass distribution within the polystyrene core of the clusters. Lastly, we show that this assembly route may be extended to gold-coated clusters.
Published: 2020
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15. Formation and optical response of self-assembled gold nanoparticle lattices on oxidized silicon synthesized using block copolymers

Author: Per Magnus Walmsness, Morten Kildemo, Virginie Ponsinet, Guillaume Fleury, Alberto Alvarez-Fernandez, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), 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), Department of Physics [Trondheim] (Physics NTNU), Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Nanostructure, Oxide, Nanoparticle, 02 engineering and technology, 01 natural sciences, chemistry.chemical_compound, Scanning probe microscopy, 0103 physical sciences, Materials Chemistry, Copolymer, Electrical and Electronic Engineering, Thin film, Instrumentation, 010302 applied physics, chemistry.chemical_classification, Plasma etching, Process Chemistry and Technology, Polymer, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, 0210 nano-technology
Abstract: The authors report here on the optical response and extraction of the morphological properties of three sizes of self-assembled nearly hexagonal arrays of gold (Au) nanoparticles (NPs), deposited on the native oxide on c-Si. The arrays were prepared by templating gold NP growth with self-assembled cylindrically organized block copolymer thin films, with consecutive removal of the polymer matrix by plasma etching. The particle sizes were controlled by using block copolymers of different molecular weights when assembling the templates. The resulting gold nanostructures were characterized by scanning probe microscopy. Spectroscopic ellipsometry was used to record the optical response of the samples, and the modeling of the spectra and the extraction of morphological parameters were performed using a modification of the Bedeaux–Vlieger formalism implemented in GranFilm. The modeling issues upon the introduction of a thin intermediate (oxide) layer between the particle and the substrate are discussed in detail, and a solution to the model procedure is proposed. The particles were modeled as truncated oblate Au spheroids in a hexagonal lattice on the native oxide on c-Si. The model fit converged to a solution indicating that the particles present a low wetting of the native oxide substrate, with parameters describing the particles and lattice in good correspondence with AFM. The extended GranFilm model simulations are also supported by finite element modeling. The authors report here on the optical response and extraction of the morphological properties of three sizes of self-assembled nearly hexagonal arrays of gold (Au) nanoparticles (NPs), deposited on the native oxide on c-Si. The arrays were prepared by templating gold NP growth with self-assembled cylindrically organized block copolymer thin films, with consecutive removal of the polymer matrix by plasma etching. The particle sizes were controlled by using block copolymers of different molecular weights when assembling the templates. The resulting gold nanostructures were characterized by scanning probe microscopy. Spectroscopic ellipsometry was used to record the optical response of the samples, and the modeling of the spectra and the extraction of morphological parameters were performed using a modification of the Bedeaux–Vlieger formalism implemented in GranFilm. The modeling issues upon the introductio...
Published: 2020
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16. Drying kinetics and acoustic properties of soft porous polymer materials

Author: Samuel Marre, Olivier Poncelet, Thomas Brunet, Raj Kumar, Jacques Leng, Yabin Jin, Olivier Mondain-Monval, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire du Futur (LOF), Université Sciences et Technologies - Bordeaux 1-RHODIA-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), We thank Frédéric Marchal and Tania Ireland from Elkem Company for fruitful discussions and for providing us with silicone rubber. Special thanks to Marco Faustini and Philippe Barois for fruitful suggestions and discussions. Special thanks to Marie-Anne Dourges, from Institut des Sciences Moléculaires – CNRS – Univ. of Bordeaux, for her help on BET analysis. This work was partially funded and performed within the framework of the Labex AMADEUS ANR-10-LABEX-0042-AMADEUS with the help of the French state Initiative d’Excellence IdEx ANR-10-IDEX-003-02 and project BRENNUS ANR-15-CE08-0024., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-15-CE08-0024,BRENNUS,Revêtements fonctionnels acoustiques à base de Métamatériaux souples(2015), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Acoustic metamaterials, Materials science, Fabrication, Emulsion templating, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Drying methods, General Materials Science, Porous materials, Composite material, Monolith, Porosity, chemistry.chemical_classification, geography, geography.geographical_feature_category, Mechanical Engineering, Supercritical drying, Polymer, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Metasurfaces, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Polymerization, Mechanics of Materials, Self-healing hydrogels, 0210 nano-technology, Porous medium
Abstract: International audience; We describe a method for the fabrication of acoustic metasurfaces, which is based on soft porous polymer materials. The materials are obtained using an emulsion templating technique, which allows for the fabrication of soft porous polymers with fully controlled porosity values between 0 and 30%. Our approach involves the polymerization of water-in-silicone emulsions with controlled water volume fractions. The obtained wet solid monolith samples are dried using three different methods. Due to the softness of the polymer matrix, and like in polyHIPE hydrogels or silica aerogels, the first method—regular air drying—leads to a collapse of the material and we present a complete experimental study of the observed kinetics as well as a model to account for the observed results. We show that this model can catch the kinetics characteristics. Then, using two alternative drying techniques, H2O2-assisted and supercritical drying, we show that it is possible to obtain materials with fully controlled porosities. The speed of sound—or equivalently the material acoustic index—inside the material being dependent on its porosity, we obtain a gradient-index acoustic material by spatially controlling the porosity distribution along the two dimensions of these metasurfaces. Their ability in terms of wavefront shaping is then demonstrated through a deflecting experiment performed in water with a sample having a thickness five times smaller than the incident acoustic wavelength at ultrasonic frequencies.
Published: 2020
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17. Tailored self-assembled nanocolloidal Huygens scatterers in the visible

Author: Olivier Mondain-Monval, Ahmed Bentaleb, Oren Regev, Romain Dezert, Rajam Elancheliyan, Einat Nativ-Roth, Sabine Castano, Virginie Ponsinet, Alexandre Baron, Philippe Barois, Teulet, Nadine, Advanced Materials by Design - - AMADEus2010 - ANR-10-LABX-0042 - LABX - VALID, Initiative d'excellence de l'Université de Bordeaux - - IDEX BORDEAUX2010 - ANR-10-IDEX-0003 - IDEX - VALID, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Chimie et Biologie des Membranes et des Nanoobjets (CBMN), École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Department of Chemical Engineering, ben Gurion University of the Negev, Isle Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Materials science, Scattering, business.industry, Forward scatter, Physics::Optics, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Light scattering, 0104 chemical sciences, Resonator, Superposition principle, Optics, Microscopy, Cluster (physics), General Materials Science, 0210 nano-technology, business, Visible spectrum
Abstract: International audience; Existing nanocolloidal optical resonators presenting strong magnetic resonances often suffer from multi-step low yield synthesis routes as well as a limited tunability, in particular in terms of spectral superposition of electric and magnetic resonances, which is the cornerstone for achieving Huygens scatterers. To overcome these drawbacks, we have synthesized clusters of gold nanoparticles using an emulsion-based formulation route. The fabrication technique involved the emulsification of an aqueous suspension of gold nanoparticles in an oil phase, followed by the controlled ripening of the emulsion. The structural control of the assynthesized clusters, of mean radius 120 nm and produced in large numbers, is demonstrated with microscopy and X-ray scattering techniques. Using a polarization-resolved multi-angle light scattering setup, we reach a comprehensive angular and spectroscopic determination of their optical resonant scattering in the visible wavelength range. We thus report on the clear experimental evidence of strong optical magnetic resonances and directional forward scattering patterns. The clusters behave as strong Huygens sources. Our findings crucially show that the electric and magnetic resonances, as well as the scattering patterns can be tuned by adjusting the inner cluster structure, playing with a simple parameter of the fabrication route. This experimental approach allows for the large scale production of nanoresonators with potential uses for Huygens metasurfaces.
Published: 2020

18. Optimal Thickness of a Porous Micro-Electrode Operating a Single Redox Reaction

Author: Tien Dung Le, Stéphane Reculusa, Gerard L. Vignoles, Didier Lasseux, Alexander Kuhn, Nicolas Mano, Lin Zhang, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Centre National de la Recherche Scientifique (CNRS), Laboratoire des Composites Thermostructuraux (LCTS), Université Sciences et Technologies - Bordeaux 1-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Snecma-SAFRAN group-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie, CNRS, UMR5295, ANR: ANR-10-LABX-0042-AMADEUS,ANR-10-LABX-0042-AMADEUS, ANR-10-IDEX-0003-02/10-IDEX-0003,IDEX BORDEAUX,IdEx Bordeaux(2010), ANR-17-CE08-0005,MOMA,Modélisation d'électrodes poreuses pour leur conception optimisée(2017), ANR-16-CE19-0001,BIO3,Electrodes poreuses biocompatibles et biofonctionnelles pour des biopiles enzymatiques miniaturisées(2016), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Snecma-SAFRAN group-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Snecma-SAFRAN group-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), and Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Sciences et Technologies - Bordeaux 1-Snecma-SAFRAN group
Subjects: Work (thermodynamics), Materials science, Thermodynamics, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Catalysis, Diffusion layer, volume averaging method, redox chemistry, Electrochemistry, computational chemistry, optimization, porous electrodes, redox chemistry, volume averaging method, Porosity, Voltammetry, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, Radius, porous electrodes, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, computational chemistry, 0104 chemical sciences, Volume (thermodynamics), Electrode, 0210 nano-technology, [CHIM.OTHE]Chemical Sciences/Other, Current density, optimization
Abstract: International audience; This article reports on a procedure to predict the optimal thickness of cylindrical porous electrodes operating a single redox reaction. This is obtained from a macroscopic model for the coupled diffusion-reaction process that is first validated with voltammetry experiments of the H2O2/H2O reductionreaction carried out with a series of porous electrodes elaborated in this work. An analytical solution to this model is developed in the steady regime and for electrodes featuring a thickness to mean radius ratio small enough compared to unity. An analytical expression of the optimal electrode thickness is derived corresponding to the crossover value of two asymptotic regimes characterizing the dependence of the volume currentdensity produced by the electrode upon its thickness. The predictive tool of the optimal thickness is general, regardless of the porous microstructure. The case of the electrodes used in the reported experiments illustrates that the optimal thickness is not intrinsic to the microsctructure characterized by the size of the representative volume, its specific area and effective diffusion coefficient. It also depends on the operating conditions reflected in the kinetic number, Ki, and the thickness of the diffusion layer surrounding the electrode. The dependence of the optimal thickness on these two parameters is quite significant in a range of very small values of Ki but remains quasi constant beyond a threshold value.
Published: 2019
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19. Ligand-free synthesis of gold nanoparticles included within cylindrical blocl copolymer films

Author: Philippe Fontaine, Testard Fabienne, Frédéric Nallet, Virginie Ponsinet, Patrick Guenoun, Aurélie Paquirissamy, Frédéric Gobeaux, Florian Aubrit, Xuan Wang, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire (LIONS), 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), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0048,FIRST-TF,Network of Facilities for Innovation, Research, Services and Training in Time & Frequency(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), 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 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), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,IdEx Bordeaux(2010), 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: Materials science, Ligand, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 01 natural sciences, Cylindrical block copolymer films, Styrene, Ligand, Gold nanoparticles, Cylindrical block copolymer films, chemistry.chemical_compound, Materials Chemistry, Copolymer, Gold nanoparticles, Surface plasmon resonance, Plasmon, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Nanocomposite, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Chemical engineering, chemistry, Colloidal gold, Grazing-incidence small-angle scattering, 0210 nano-technology
Abstract: International audience; We report a method to incorporate non-functionalized gold nanoparticles (AuNPs) in oriented cylindrical phases of poly(styrene)-b-poly(vinylpyridine) (PS-b-PVP) block copolymers, perpendicular or parallel to a substrate. The combination of AFM, TEM, GISAXS and spectroscopy allows complete characterization of the nanocomposites. AuNPs are produced by the ultra-sound reduction of a gold salt in the copolymer solution, prior to the deposition of the films by spin-coating. The AuNPs are found to be located within the PVP cylinders exclusively. Sizes from 2 to 4 nm are tuned as a function of the initial gold salt concentration. The seeded-growth of these pre-formed AuNPs was also achieved by a further ultra-sound treatment to produce larger AuNPs (up to d = 10 nm) with plasmon resonance properties. For parallel cylinders, the presence of AuNPs in the PVP domains disturbs the organization, while for perpendicular cylinders, the PVP domains are swollen without any change in their orientation. The synthesis of AuNPs inside the copolymer was also performed by radiolysis, through irradiation of the copolymer solution or the copolymer film, both containing the gold salt. In these cases, the presence of plasmonic AuNPs was also evidenced. Offering a control of the AuNP size (o2 nm to 10 nm) and location, the presented method is a promising way to insert plasmonic AuNPs into oriented cylinders for achieving anisotropic geometries of valuable interest for optics
Published: 2018
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20. Mechanical and acoustic properties of macroporous acrylate materials near glass transition

Author: Thomas Brunet, Artem Kovalenko, Olivier Mondain-Monval, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Sciences et Ingénierie de la Matière Molle (UMR 7615) (SIMM), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Sciences et Ingénierie de la Matière Molle (SIMM), ESPCI ParisTech-PSL Research University (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), École Nationale Supérieure d'Arts et Métiers (ENSAM), and HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)
Subjects: chemistry.chemical_classification, Acrylate, Materials science, Polymers and Plastics, Organic Chemistry, 02 engineering and technology, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, Methacrylate, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Matrix (mathematics), chemistry, Polymerization, Speed of sound, Materials Chemistry, Composite material, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 0210 nano-technology, Glass transition, Porosity, [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft], ComputingMilieux_MISCELLANEOUS
Abstract: We study the evolution of the acoustic properties of porous polymer materials in the glass transition temperature domain. First, we study the cross-linked 2-ethylhexyl acrylate (EHA) – 2-ethylhexyl methacrylate (EHMA) non-porous matrices at various compositions and, consequently, various glass transition temperatures. Based on the frequency-temperature equivalence principle, we build master curves in order to determine the bulk (K0) and shear (G0) moduli corresponding to ultrasonic frequencies (about 300 kHz). Next, we synthesize some porous samples of these matrices using the emulsion-templated polymerization approach usually known as polyHIPE (for polymerized High Internal Phase Emulsion). We measure the longitudinal sound speed CL for different matrix compositions (at room temperature) or at different temperatures (for the same sample composition). As expected, we show that the sound speed decreases with increasing K0/G0 ratio, i.e. as matrices become softer, which is either due to an increase of EHA content or to an increase of the temperature. This demonstrates how composition and temperature may be used to tune the sound speed in porous polymers. We show that the theoretical predictions using a low-frequency multiple scattering model leads to underestimated values of the sound speed, especially for soft matrix. We attribute this discrepancy to the difference in mechanical properties of the polymer matrix between non porous and porous samples.
Published: 2018
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21. Core@double-shells nanowires strategy for simultaneously improving dielectric constants and suppressing losses of poly(vinylidene fluoride) nanocomposites

Author: Yu Yang, Delong He, Jinkai Yuan, Hang Zhao, Jinbo Bai, Minhao Yang, Chaohe Hu, Paul Haghi-Ashtiani, Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, State key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUHAN UNIVERSITY OF TECHNOLOGY, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), France ANR and Solvay of the project ELENA, and ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010)
Subjects: Nanocomposite, Materials science, Shell (structure), Nanowire, chemistry.chemical_element, 02 engineering and technology, General Chemistry, Dielectric, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Barrier layer, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry.chemical_compound, chemistry, Dissipation factor, General Materials Science, Composite material, 0210 nano-technology, Fluoride, Carbon
Abstract: International audience; The core@double-shells structured TiO2@Carbon@SiO2 nanowires (TiO2@C@SiO2 NWs) with a uniform carbon inner shell and a SiO2 outer shell were successfully synthesized and subsequently incorporated into poly(vinylidene fluoride) (PVDF) matrix to prepare dielectric nanocomposites. Compared with the pristine TiO2 NWs/PVDF nanocomposites, the introduction of carbon interlayer as the inner shell between the TiO2 core and SiO2 outer shell offers the nanocomposites with two additional types of interfacial polarization, namely, (i) TiO2/carbon and (ii) carbon/SiO2 interfacial polarizations. These additional interfacial polarizations promote the dielectric constants, and simultaneously the SiO2 insulating barrier layer suppresses the losses of the nanocomposites. Moreover, the nanocomposite with 30 wt % filler loading (19.78 vol %) exhibits an excellent dielectric performance with a constant of 41 and a loss tangent of 0.05 at 103 Hz. The multi-shells strategy reported here could be extended to a variety ofinorganic hybrids to develop novel dielectric nanocomposites.
Published: 2018
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22. Enhancing the ferroelectric performance of P(VDF-co-TrFE) through modulation of crystallinity and polymorphism

Author: Nicoletta Spampinato, Giuseppe Portale, Eleni Pavlopoulou, Georges Hadziioannou, Jon Maiz, Mario Maglione, 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), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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), NWO DUBBLE CRG (ESRF, Netherlands Org Sci Res), European Synchrotron Radiation Facility (ESRF), University of Groningen [Groningen], Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), TOURS2015 project ('Investissements d’Avenir' Program of the French State) through the grant agreement noO12590-401530. Financial support from the HOMERIC Industrial Chair (Arkema/ANR) with the grant agreement no AC-2013-365., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), and Macromolecular Chemistry & New Polymeric Materials
Subjects: Materials science, VINYLIDENE FLUORIDE, Polymers and Plastics, Structure-function relations, Annealing (metallurgy), STRUCTURAL CORRELATION, 02 engineering and technology, Processing, 010402 general chemistry, NONVOLATILE MEMORY, 01 natural sciences, Crystallinity, LAMELLAR MORPHOLOGY, Materials Chemistry, X-RAY SCATTERINGS, Thin film, FLUORIDE-TRIFLUOROETHYLENE COPOLYMERS, P(VDF-TRFE) THIN-FILMS, CURIE TRANSITION, Ferroelectric polymers, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, Coercivity, 021001 nanoscience & nanotechnology, Ferroelectricity, Giwaxs, 0104 chemical sciences, Non-volatile memory, P(vdf-trfe), POLY(VINYLIDENE FLUORIDE-TRIFLUOROETHYLENE) FILMS, [CHIM.POLY]Chemical Sciences/Polymers, Chemical physics, PHASE-TRANSITION, Crystallite, 0210 nano-technology
Abstract: The functional properties of P(VDF-co-TrFE) are strongly dependent on its structure, which, in turn, depends on processing conditions applied. In this work we investigate the P(VDF-co-TrFE) processing structure-function relationships, in order to find the thermal conditions that result in optimum ferroelectric performance in thin film configuration. Our results show that annealing temperature affects mostly the remnant polarization value, P, while annealing time has a severe effect on the coercive field, E-c, An optimized ferroelectric functionality, in terms of high P-r of about 90 mC/m(2) and low E-c of 50 MV/m, is achieved and rationalized through structural analysis by means of GIWAXS. The best performing structure exhibits a high degree of crystallinity, a preferential orientation of the crystallites with the polymer chains parallel to the substrate and the occurrence of three ferroelectric phases. A deconvolution study demonstrates the presence of a moderately unstable ferroelectric phase that is designated to facilitate ferroelectric switching. Our findings show that a single step of 15 min annealing at 135 degrees C leads to high performance P(VDF-co-TrFE) structure, proving that the 2 h-long annealing step that is traditionally applied is not necessary. (C) 2018 Elsevier Ltd. All rights reserved.
Published: 2018
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23. Nonreciprocal Thermal Material by Spatiotemporal Modulation

Author: Daniel Torrent, Jean-Chirstophe Batsale, Olivier Poncelet, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), GROC∙UJI (INIT), Université de Jaume, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Institut de Mathématiques de Marseille (I2M), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), U.S. Office of Naval Research under Grant No. N00014-17-1-2445, ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), ANR: ANR-10-LABX-0042-AMADEUS,ANR-10-LABX-0042-AMADEUS, ANR-10-IDEX-0003-02/10-IDEX-0003,IDEX BORDEAUX,IdEx Bordeaux(2010), Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, and HESAM Université (HESAM)-HESAM Université (HESAM)
Subjects: [PHYS]Physics [physics], Condensed Matter - Materials Science, Materials science, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, Mechanics, Sense (electronics), 021001 nanoscience & nanotechnology, 01 natural sciences, Heat capacity, Thermal conductivity, Heat flux, Modulation, 0103 physical sciences, Thermal, 010306 general physics, 0210 nano-technology, Heat flow, Diode
Abstract: The thermal properties of a material with a spatio-temporal modulation in both the thermal conductivity and the mass density are studied. The special configuration studied here consists of a modulation in a wave-like fashion. It is found that these materials behaves, in an effective way, as materials with an internal convection-like term that provides them of non-reciprocal properties, in the sense that the flow of heat has different properties when it propagates in the same direction or in the opposite one to the modulation of the parameters. An effective medium description is presented which accurately describes the modulated material, and numerical simulations supports both the non-reciprocal properties and the effective medium description. It is found that these materials are promising candidates for the design of thermal diodes and other advanced devices for the control of the heat flow at all scales.
Published: 2018
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24. All-organic microelectromechanical systems integrating electrostrictive nanocomposite for mechanical energy harvesting

Author: Philippe Poulin, Cédric Ayela, Hélène Debéda, Jinkai Yuan, Isabelle Dufour, Hussein Nesser, Annie Colin, 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), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-12-NANO-0002,ELENA,Electrostriction géante de nanomatériaux mous pour la récupération d'énergie(2012), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: All-organic MEMS, Fabrication, Materials science, Electrostriction, 02 engineering and technology, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Capacitance, law.invention, chemistry.chemical_compound, law, General Materials Science, Electrical and Electronic Engineering, Composite material, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Mechanical energy, Microelectromechanical systems, Nanocomposite, Polydimethylsiloxane, Renewable Energy, Sustainability and the Environment, Graphene, business.industry, Energy harvesting, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Printing process, Optoelectronics, 0210 nano-technology, business
Abstract: International audience; Recent advances in the field of microelectromechanical systems (MEMS) have generated great interest in thesubstitution of inorganic microcantilevers by organic ones, due to their low cost, high flexibility and a simplifiedfabrication by means of printing methods. Here, we present the integration of electrostrictive nanocompositesinto organic microcantilever resonators specifically designed for mechanical energy harvesting from ambientvibrations. Strain sensitive nanocomposite materials composed of reduced graphene oxide (rGO) dispersed inpolydimethylsiloxane (PDMS) are integrated into all-organic MEMS by means of an innovative low-cost andenvironment friendly process by combining printing techniques and xurography. Static tests of the electrostrictivenanocomposite with 3.7 wt% rGO show good performances with variations of capacitance that exceeds4% for strain values lower than 0.55% as the microcantilever is bent. The results in dynamic mode suggest thatthe organic MEMS meet the requirements for vibration energy harvesting. With an applied sinusoidal acceleration(amplitude 0.5 g, frequency 15 Hz) a power density of 6 μW/cm3 is achieved using a primitive circuit.
Published: 2018
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25. Silicon-Based Dielectric Metamaterials: Focus on the Current Synthetic Challenges

Author: Sanaa Semlali, Brian A. Korgel, Maria Letizia De Marco, Glenna L. Drisko, Cyril Aymonier, P. Barois, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), McKetta Department of Chemical Engineering, University of Texas, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Investissements d'Avenir program of the French government managed by the Agence Nationale de la Recherche. B.A.K. acknowledges funding by the Robert A. Welch Foundation (grant no. F-1464)., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Optical fiber, Materials science, Silicon, chemistry.chemical_element, Physics::Optics, 02 engineering and technology, Dielectric, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Catalysis, law.invention, Split-ring resonator, law, Porosity, meta-atoms, particles, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Scattering, Metamaterial, silicon, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, metamaterials, chemistry, Metamaterial absorber, synthetic methods, Optoelectronics, 0210 nano-technology, business
Abstract: Metamaterials have optical properties that are unprecedented in nature. They have opened new horizons in light manipulation, with the ability to bend, focus, and completely reflect, transmit or absorb an incident wave front. Optically active metamaterials in particular could be used for applications ranging from 3D information storage, more efficient photovoltaic cells, high security watermarks, and fiber optics. Silicon (Si) particles are some of the most promising building blocks for optically active metamaterials, with high scattering efficiency coupled to low light absorption for visible frequencies. However, to date ideal Si building blocks cannot be produced using bulk synthesis techniques, and thus metamaterial construction is currently confounded. The key to unleashing the potential of Si metamaterials is to find a route to produce Si building blocks between 75-200 nm in diameter that are uniform in size and shape, crystalline, have few impurities and little to no porosity. This review provides theoretical background about Si optical properties for metamaterials, an overview of current synthetic methods and provides direction towards the most promising routes to ideal Si particles for metamaterials.
Published: 2018
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26. Correlating the Seebeck coefficient of thermoelectric polymer thin films to their charge transport mechanism

Author: Eric Cloutet, Guillaume Fleury, Eleni Pavlopoulou, Xavier Crispin, Yan Fang Chen, Stefan Dilhaire, Magnus Berggren, Ioannis Petsagkourakis, Mats Fahlman, Xjianjie Liu, Georges Hadziioannou, 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), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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), 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), Linköping University (LIU), Department of Science and Technology [Linköping], Laboratoire Ondes et Matière d'Aquitaine (LOMA), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Région Aquitaine et Arkema - AC-2013-365Région Aquitaine - PhD grant #20111101004, ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Laboratoire de Chimie des Polymères Organiques ( LCPO ), Université de Bordeaux ( UB ) -Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique ( CNRS ), TEAM 4 LCPO, Université de Bordeaux ( UB ) -Institut Polytechnique de Bordeaux-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 ), Linköping University ( LIU ), Laboratoire Ondes et Matière d'Aquitaine ( LOMA ), Université de Bordeaux ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), ANR-10-EQPX-28-01/10-EQPX-0028,ELORPrintec,'Plate-forme de l’Université de Bordeaux pour l’organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation' ( 2010 ), ANR : ANR-10-LABEX-0042-AMADEUS,Labex AMADEUS, and ANR-10-IDEX-0003-02/10-IDEX-0003,IDEX BORDEAUX,IdEx Bordeaux ( 2010 )
Subjects: Materials science, [ PHYS.COND.CM-MS ] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Conducting polymers, 02 engineering and technology, Charge transport, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Biomaterials, Electrical resistivity and conductivity, Seebeck coefficient, Thermoelectric effect, Materials Chemistry, Electrical and Electronic Engineering, PEDOT, Conductive polymer, Organic electronics, chemistry.chemical_classification, Thermoelectrics, Condensed matter physics, General Chemistry, Polymer, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Thermoelectric materials, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, [ CHIM.POLY ] Chemical Sciences/Polymers, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Charge carrier, 0210 nano-technology
Abstract: International audience; Room temperature flexible heat harvesters based on conducting polymers are ideally suited to cover the energy demands of the modern nomadic society. The optimization of their thermoelectric efficiency is usually sought by tuning the oxidation levels of the conducting polymers, even if such methodology is detrimental to the Seebeck coefficient (S) as both the Seebeck coefficient and the electrical conductivity (σ) are antagonistically related to the carrier concentration. Here we report a concurrent increase of S and σ and we experimentally derive the dependence of Seebeck coefficient on charge carrier mobility for the first time in organic electronics. Through specific control of the conducting polymer synthesis, we enabled the formation of a denser percolation network that facilitated the charge transport and the thermodiffusion of the charge carriers inside the conducting polymer layer, while the material shifted from a Fermi glass towards a semi-metal, as its crystallinity increased. This work sheds light upon the origin of the thermoelectric properties of conducting polymers, but also underlines the importance of enhanced charge carrier mobility for the design of efficient thermoelectric polymers.
Published: 2018
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27. Faradaic and/or capacitive: Which contribution for electrochromism in NiO thin films cycled in various electrolytes?

Author: Mathias Da Rocha, Bruce Dunn, Aline Rougier, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of California [Los Angeles] (UCLA), University of California, The authors wish to thank the University of Bordeaux for funding this research and in particular the Ph. D. grant of M. Da Rocha. Bruce Dunn wishes to thank the LabEx AMADEus (ANR-10-LABX-42) in the framework of IdEx Bordeaux (ANR-10-IDEX-03-02), i.e. the Investissements d’Avenir programme of the French government managed by the Agence Nationale de la Recherch, for supporting his invited professor fellowship., ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, chemistry.chemical_element, 02 engineering and technology, Electrolyte, 010402 general chemistry, Electrochemistry, 01 natural sciences, Capacitive, Transmittance, Device, Thin film, Nickel oxide, Electrochromism, Renewable Energy, Sustainability and the Environment, Non-blocking I/O, [CHIM.MATE]Chemical Sciences/Material chemistry, Sputter deposition, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Chemical engineering, chemistry, Lithium, Mechanism, 0210 nano-technology
Abstract: International audience; This study compares the electrochromic performance of NiO thin films deposited by RF magnetron sputtering cycled in lithium, sodium and small cations free based electrolytes, namely 1:9 LiTFSI in EMITFSI, 1:9 NaTFSI in EMITFSI and EMITFSI respectively. Regardless of the electrolyte nature, NiO thin films show similar electrochromic properties associated with an optical switch from colorless to brownish upon oxidation correlated to a modulation of transmittance close to 40 % associated with a good electrochemical stability. Interestingly, depending on the electrolyte nature, the EC behavior is correlated with various CV shapes raising the question of the mechanism involved. In particular, the reversible coloration mechanism cannot be only described by a single insertion/extraction of lithium ions, as observed for tungsten oxide in lithium media. The rectangular shape of the CV curves of NiO thin films in neat electrolyte and the behavior of NiO with various scan rates suggest that the EC properties result from a combination of both faradaic and capacitive contributions, with redox reactions largely occurring at the surface. Integration of NiO thin films in a full device is illustrated in double sided PANI/white electrolyte-EMITFSI/NiO EC devices showing simultaneous progressive color changes from blue to green and white to brown, on PANI and NiO sides, respectively.
Published: 2019
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28. Flat bands in metamaterials based on angularly layered metal–dielectric scatterers

Author: Said El-Jallal, Daniel Torrent, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Acoustics and Ultrasonics, 02 engineering and technology, Dielectric, 01 natural sciences, Metal, Optics, 0103 physical sciences, 010306 general physics, Low group velocity, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Flat bands, business.industry, Metamaterial, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Polar anisotropy, visual_art, Metamaterials, Periodic media, visual_art.visual_art_medium, Anisotropy, 0210 nano-technology, business
Abstract: International audience; In this work, we propose the realization of electromagnetic metamaterials in two and three dimensions by means of highly anisotropic rods and spheres. The two-dimensional case is deeply analyzed, and the realization of an anisotropic rod by means of angularly layered cylinders is proposed. The band structure of a periodic arrangement of angularly layered rodsis computed, showing a low frequency band gap and some flat modes within it which increases as a function of the number of sectors in the cylinder. The system is studied by means of an effective medium approach, and it is found that the flat bands correspond to a sharp frequency region where the effective metamaterial is doubly negative. A perfect agreement is found between the dispersion curves obtained by means of the effective medium model and the full band structure computed by the finite element method. It is also found that only four sectors in the angularly layered cylinder are enough to obtain the desired double negativity, which is a promising result in view of the fabrication of the presented structures. Finally, the three-dimensional version of these materials is analyzed by means of anisotropic spheres, showing similar results.
Published: 2017
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29. Low-Molecular-Weight Hydrogels as New Supramolecular Materials for Bioelectrochemical Interfaces

Author: Deepak Jain, Magdalena Murawska, Sébastien Gounel, Sabrina Bichon, Bertrand Goudeau, Philippe Barthélémy, Aleksandar Karajić, Nicolas Mano, Alexander Kuhn, Inserm U1212, CNRS 5320, Université de Bordeaux, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires (ISM), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Université Sciences et Technologies - Bordeaux 1-Université Montesquieu - Bordeaux 4-Institut de Chimie du CNRS (INC), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), European Project: 607793,EC:FP7:PEOPLE,FP7-PEOPLE-2013-ITN,BIOENERGY(2013), European Project: ANR-12-BS08-0011-01, Acides Nucléiques : Régulations Naturelle et Artificielle (ARNA), Université de Bordeaux (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Biocompatibility, Supramolecular chemistry, Nanotechnology, 02 engineering and technology, engineering.material, nucleoside, 010402 general chemistry, 01 natural sciences, fluorocarbon amphiphile, Coating, Amphiphile, low molecular weight gel, General Materials Science, enzyme electrodes, Voltammetry, supramolecular assembly, glycosyl, bioelectrochemistry, porous electrodes, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Self-healing hydrogels, Electrode, engineering, Cyclic voltammetry, 0210 nano-technology
Abstract: Controlling the interface between biological tissues and electrodes remains an important challenge for the development of implantable devices in terms of electroactivity, biocompatibility, and long-term stability. To engineer such a biocompatible interface a low molecular weight gel (LMWG) based on a glycosylated nucleoside fluorocarbon amphiphile (GNF) was employed for the first time to wrap gold electrodes via a noncovalent anchoring strategy, that is, self-assembly of GNF at the electrode surface. Scanning electron microscopy (SEM) studies indicate that the gold surface is coated with the GNF hydrogels. Electrochemical measurements using cyclic voltammetry (CV) clearly show that the electrode properties are not affected by the presence of the hydrogel. This coating layer of 1 to 2 μm does not significantly slow down the mass transport through the hydrogel. Voltammetry experiments with gel coated macroporous enzyme electrodes reveal that during continuous use their current is improved by 100% compared to the noncoated electrode. This demonstrates that the supramolecular hydrogel dramatically increases the stability of the bioelectrochemical interface. Therefore, such hybrid electrodes are promising candidates that will both offer the biocompatibility and stability needed for the development of more efficient biosensors and biofuel cells.
Published: 2017
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30. Colloidal Alchemy: Conversion of Polystyrene Nanoclusters into Gold

Author: Vinothan N. Manoharan, Jean-Christophe Taveau, Etienne Duguet, Cyril Chomette, Olivier Lambert, Serge Ravaine, Mona Tréguer-Delapierre, Nicholas Schade, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Department of Physics and the Division of Engineering and Applied Sciences (Harvard University), Harvard University [Cambridge], Chimie et Biologie des Membranes et des Nanoobjets (CBMN), École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), and Université de Bordeaux (UB)-École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, seedmediated growth, Energy Engineering and Power Technology, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Nanoclusters, Biomaterials, Colloid, chemistry.chemical_compound, Adsorption, Etching (microfabrication), Materials Chemistry, Plasmon, plasmonic clusters, platonic solids, Renewable Energy, Sustainability and the Environment, technology, industry, and agriculture, [CHIM.MATE]Chemical Sciences/Material chemistry, gold, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Electron tomography, chemistry, Transmission electron microscopy, silica, Polystyrene, 0210 nano-technology
Abstract: International audience; Isotropic plasmonic clusters consisting of a controlled number of gold satellites around a silica core are fabricated from silica/polystyrene tetrapod, hexapod, and dodecapod templates. The synthetic pathway includes stages of site-specific seed adsorption, seed-mediated growth, and iterative etching/regrowth to reshape the satellites into spheroids. Transmission electron microscopy and electron tomography provide evidence of the symmetry of the clusters. This work paves the way for comprehensive study of their optical properties.
Published: 2017
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31. Tailoring of the porous structure of soft emulsion-templated polymer materials

Author: Olivier Mondain-Monval, Thomas Brunet, Benoit Mascaro, Kevin Zimny, Artem Kovalenko, Institut Charles Sadron (ICS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-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))-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), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Vibrations Acoustique (LVA), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut National de la Recherche Agronomique (INRA), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), and ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010)
Subjects: chemistry.chemical_classification, [PHYS]Physics [physics], Materials science, Polydimethylsiloxane, 02 engineering and technology, General Chemistry, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Silicone, chemistry, Polymerization, Speed of sound, Emulsion, Composite material, 0210 nano-technology, Porous medium, Porosity
Abstract: International audience; This paper discusses the formation of soft porous materials obtained by the polymerization of inverse water-in-silicone (polydimethylsiloxane, PDMS) emulsions. We show that the initial state of the emulsion has a strong impact on the porous structure and properties of the final material. We show that using a surfactant with different solubilities in the emulsion continuous phase (PDMS), it is possible to tune the interaction between emulsion droplets, which leads to materials with either interconnected or isolatedpores. These two systems present completely different behavior upon drying, which results in macroporous air-filled materials in the interconnected case and in a collapsed material with low porosity in the second case. Finally, we compare the mechanical and acoustical properties of these two types of bulk polymer monoliths. We also describe the formation of micrometric polymer particles (beads) in these two cases. We show that materials with an interconnected macroporous structure have low mechanical moduli andlow sound speed, and are suitable for acoustic applications. The mechanical and acoustical properties of the materials with a collapsed porous structure are similar to those of non-porous silicone, which makes them acoustically inactive.
Published: 2016
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32. Investigation of the dynamics of growth of polymer materials obtained by combined pervaporation and micro-moulding

Author: Philippe Poulin, Jean-Baptiste Salmon, Cédric Laval, Laboratoire du Futur (LOF), Université Sciences et Technologies - Bordeaux 1-RHODIA-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), MEMS ORGA grant, ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: chemistry.chemical_classification, Aqueous solution, Fabrication, Materials science, Microfluidics, Nanotechnology, 02 engineering and technology, General Chemistry, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Chip, 01 natural sciences, Polymers materials, 0104 chemical sciences, Matrix (chemical analysis), [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry, Chemical engineering, Scientific method, Pervaporation, 0210 nano-technology
Abstract: International audience; We report an extensive study of the concentration process of aqueous polymer solutions confined within microfluidic channels, owing to the pervaporation of water through the matrix of the chip. Concentration of polymer continuously increases up to the formation of a dense material which eventually invades the channel. This technology can be used to fabricate micro-composites of different shapes starting from dilute inks. We use both theory and screening experiments to show that the dynamics of growth can be predicted by simple conservation equations. More precisely, we establish a quantitative prediction of the growth dynamics taking into account deformations of the soft channels of the moulds, and the solvent chemical activity of the polymer solution. The present results based on general transport equations for binary mixtures provide direct guidance for the design of micro-fabricated materials considering their shape, dimensions, time scale of fabrication, and chemical composition. This quantitative framework is indeed essential to engineer integrated polymer-based micro-devices by using combined pervaporation and microfluidic moulding.
Published: 2015
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33. Wet-Spun Bioelectronic Fibers of Imbricated Enzymes and Carbon Nanotubes for Efficient Microelectrodes

Author: Jad Rouhana, Isabelle Ly, Sébastien Gounel, Philippe Poulin, Nicolas Mano, Anne-Sophie Michardière, Cintia Mateo-Mateo, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-12-BS08-0011,RATIOCELLS,Ingénierie de matériaux poreux et d'enzymes pour le développement de biopiles(2012), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Bioelectronics, business.product_category, Materials science, Immobilized enzyme, carbon nanotubes, enzymes, microfibers, Nanotechnology, Carbon nanotube, [CHIM.CATA]Chemical Sciences/Catalysis, Catalysis, Nanomaterials, law.invention, oxygen reduction, Microelectrode, law, Microfiber, Electrode, Electrochemistry, Fiber, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], business, wet spinning
Abstract: International audience; The electrical connection of enzymes and microelectrodes is usually achieved through the direct deposition of biomoleculesat the electrode surface. Optimization of this interface can be achieved by using conductive nanomaterials such as carbonnanotubes, by adding shuttles of electrons, and/or by tuning the geometry of the electrode. However, immobilized enzymesremain essentially located at the outer surface of the electrode, thereby limiting the current density of the devices. A singlestep,scalable wet-spinning approach that allows the fabrication of microfibers into which enzymes and carbon nanotubes are imbricated in the core of the fiber is reported in this work. The efficiency of these bioelectronics fibers is tested in the enzymatic reduction of O2 and glucose oxidation. The presented microelectrodes exhibit a significantly enhanced activity compared to surface-coated microelectrodes, while preserving all of the advantages of microelectrodes in terms of miniaturization and spatiotemporal resolution.
Published: 2015
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34. Bottom-up Generation of Miniaturized Coaxial Double Electrodes with Tunable Porosity

Author: Matthias Heim, Patrick Garrigue, Serge Ravaine, Stéphane Reculusa, Aleksandar Karajić, Nicolas Mano, Alexander Kuhn, Institut des Sciences Moléculaires (ISM), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Université Sciences et Technologies - Bordeaux 1-Université Montesquieu - Bordeaux 4-Institut de Chimie du CNRS (INC), BrivaTech-ADERA, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), European Project: 607793,EC:FP7:PEOPLE,FP7-PEOPLE-2013-ITN,BIOENERGY(2013), and Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Mechanics of Materials, Mechanical Engineering, Electrode, Analytical chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, Coaxial, Composite material, Colloidal crystal, Porosity, 7. Clean energy, Langmuir–Blodgett film
Abstract: International audience; A bottom-up approach is proposed for the design of a fully integrated miniaturized electrochemical cell with independently addressable cylindrical macroporous electrodes. The presented strategy allows excellent control over the pore size, the thickness of each macroporous electrode, as well as their separation gap. Such coaxial architectures are potentially suitable for the elaboration of miniaturized electrochemical devices such as (bio)fuel cells, supercapacitors, or biosensors.
Published: 2015
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35. Effect of the Rheological Properties of Carbon Nanotube Dispersions on the Processing and Properties of Transparent Conductive Electrodes

Author: Laurent Maillaud, Matteo Pasquali, Cécile Zakri, Philippe Poulin, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010)
Subjects: Materials science, Carbon nanotube actuators, 02 engineering and technology, Carbon nanotube, engineering.material, 010402 general chemistry, 01 natural sciences, law.invention, Viscosity, Rheology, Coating, law, Electrochemistry, General Materials Science, Spectroscopy, Transparent conducting film, Conductive polymer, [PHYS.PHYS]Physics [physics]/Physics [physics], Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Chemical engineering, engineering, Wetting, 0210 nano-technology
Abstract: International audience; Transparent conductive films are made from aqueous surfactant stabilized dispersions of carbon nanotubesusing an up-scalable rod coating method. The processability of the films is governed by the amount of surfactant which is shown to alter strongly the wetting and viscosity of the ink. The increase of viscosity results from surfactant mediated attractive interactions between the carbon nanotubes. Links between the formulation, ink rheological properties, and electro-optical properties of the films are determined. The provided guidelines are generalized and used to fabricate optimized electrodes using conductive polymers and carbon nanotubes. In these electrodes, the carbon nanotubes act as highly efficient viscosifiers that allow the optimized ink to be homogeneously spread using the rod coating method. From a general point of view and in contrast to previous studies, the CNTs are optimally used in the present approach as conductive additives for viscosity enhancements of electronic inks.
Published: 2015
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36. Metallic Nanodot Patterns with Unique Symmetries Templated from ABC Triblock Terpolymer Networks

Author: Cécile Dobrzynski, Muhammad Waseem Mumtaz, Alberto Alvarez-Fernandez, Virginie Ponsinet, Gilles Pecastaings, Georges Hadziioannou, Karim Aissou, Ségolène Antoine, Jean Mercat, Guillaume Fleury, Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, 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)-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 de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), 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), Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts (CARDAMOM), Institut de Mathématiques de Bordeaux (IMB), Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), ANR-10-EQPX-0028,ELORPrinttec,'Plate-forme de l'Université de Bordeaux pour l'organique électronique imprimable : de la molécule aux dispositifs et systèmes intégrés - valorisation et commercialisation'(2010), ANR-13-CHIN-0002,HOMERIC,Assemblage Hiérarchique de Matériaux Organiques pour l'Electronique(2013), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest
Subjects: Materials science, Polymers and Plastics, Polymers, Thin films, Metal Nanoparticles, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Network structures, Materials Chemistry, Copolymer, Thin film, Plasmon, Gold nanodots, Organic Chemistry, Self-assembly, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Template, Orthorhombic crystal system, Gold, Nanodot, 0210 nano-technology, Biological imaging, Triblock terpolymers
Abstract: International audience; Nanotemplates derived from the self-assembly of AB-type block copolymers provide an elegant route to achieve well-defined metallic dot arrays, even if the variety of pattern symmetries is restricted due to the limited number of structures offered by microphase separated diblock copolymers. A strategy that relies on the use of complex network structures accessible through the self-assembly of linear ABC-type terpolymers is presented for the formation of metallic nanodots arrays with “outside-the-box” symmetries. Patterned templates formed by the cubic Q214 and orthorhombic O70 network structures are used as excellent platforms to build well-ordered gold nanodot arrays with unique p3m1 and p2 symmetries, respectively. A simple yet efficient blending strategy is used to tune the critical dimensions of the p3m1 pattern while laterally ordered gold nanodot arrays are also demonstrated through a directed self-assembly approach. Such highly ordered gold nanodots with tunable particle dimensions and array periods, enabling the control of their plasmonic responses, are attractive probes for biological imaging.
Published: 2018
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37. Plasmonic Optical Interferences for Phase-Monitored Nanoscale Sensing in Low-Loss Three-Dimensional Metamaterials

Author: P. Barois, Xuan Wang, Johann Toudert, Clémence Tallet, Virginie Ponsinet, Ashod Aradian, Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laser Processing Group, ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Phase (waves), Physics::Optics, 02 engineering and technology, Photon energy, 010402 general chemistry, Optical phase, 7. Clean energy, 01 natural sciences, Nanoscale sensing, Optics, Ellipsometry, Electrical and Electronic Engineering, Absorption (electromagnetic radiation), Plasmon, business.industry, Metamaterial, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Angle of incidence (optics), 3D metamaterials, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, 0210 nano-technology, business, Biotechnology, Localized surface plasmon, Plasmonic optical interferences
Abstract: We report a powerful and general concept for the design of three-dimensional metamaterials suitable for optically probed nanoscale sensing, combining the environmental sensitivity of localized surface plasmon resonances (LSPRs) and a low absorption of the probe light, even when the LSPRs are supported by lossy plasmonic elements. This concept is based on the tuning of the plasmon-induced Brewster conditions (angle of incidence and photon energy) of the material by suitable tailoring of its structure. This tuning is made possible by the interplay between LSPRs and optical interferences, i.e., the so-called plasmonic optical interferences. The plasmon-induced Brewster photon energy can be set outside the spectral range of the LSPR, thus in a spectral region of low optical absorption. Such off-resonant' plasmon-induced Brewster conditions are examplified in a self-assembled lamellar three-dimensional metamaterial consisting of stacked polymer layers doped with gold nanoparticles alternating with undoped polymer layers. At the off-resonant' plasmon-induced Brewster conditions, an abrupt jump of the ellipsometric phase angle δ occurs in the photon energy space. In the spectral vicinity of this jump, δ shows strong sensitivity to the spectral features of the LSPR, potentially allowing the detection of infinitesimal LSPR energy shifts (
Published: 2015
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38. Resonant isotropic optical magnetism of plasmonic nanoclusters in visible light

Author: Stéphane Mornet, Etienne Duguet, Philippe Barois, Matteo Albani, S. Manoj Gali, Virginie Ponsinet, Jean-Baptiste Salmon, Mona Tréguer-Delapierre, Philippe Richetti, Andrea Vallecchi, Sergio Gómez-Graña, Aurélie Le Beulze, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire du Futur (LOF), Université Sciences et Technologies - Bordeaux 1-RHODIA-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Information Engineering [Sienne] (DII), Università degli Studi di Siena = University of Siena (UNISI), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Materials science, Condensed matter physics, Magnetism, Isotropy, 02 engineering and technology, PACS: 78.67.Bf, 75.75.−c, 42.68.Mj, 78.20.Ci, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Light scattering, Electronic, Optical and Magnetic Materials, Nanoclusters, Characterization (materials science), Extinction (optical mineralogy), 0103 physical sciences, Electronic, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Optical and Magnetic Materials, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, 0210 nano-technology, Plasmon, Visible spectrum
Abstract: International audience; We present a full experimental characterization of isotropic artificial optical magnetism at visible frequencies produced by “raspberrylike” plasmonic nanoclusters synthesized by a bottom-up approach. Experimental measurements of extinction and light scattering associated with numerical simulations enable one to extract absolute values of the magnetic scattering cross section across the whole visible spectral range. The strength of the resonant magnetic response of a single magnetic nanocluster is illustrated as the effective magnetic permeability of a homogeneous sphere of identical volume.
Published: 2015
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39. Invisible omnidirectional lens for flexural waves in thin elastic plates

Author: Daniel Torrent, Bahram Djafari-Rouhani, Yabin Jin, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), and ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010)
Subjects: Work (thermodynamics), Materials science, Acoustics and Ultrasonics, Invisible lens, interference, Physics::Optics, 02 engineering and technology, Flexural waves, 01 natural sciences, law.invention, Optics, law, Flexural wave, 0103 physical sciences, Point (geometry), 010306 general physics, Extreme value theory, Omnidirectional antenna, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Finite element method, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Lens (optics), Thickness variation, 0210 nano-technology, business, Refractive index
Abstract: International audience; A feasible approach is proposed in this work to realize an acoustic omnidirectional invisible lens for flexural waves in thin elastic plates. These devices require extreme values of the refractive index close to its center, and in this work this drawback is overcome by reducing gradually the thickness of the elastic plate, which has the same effect as increasing proportionally the refractive index. Although ideally the thickness of the plate should be zero at the central point, it is shown that a finite but small minimum thickness is enough to provide a good invisibility effect. Numerical simulations are performed by the finite element method, which supports the theoretical predictions, showing that an invisible lens is feasible for flexural waves.
Published: 2017
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40. Soft 3D acoustic metamaterial with negative index

Author: Aurore Merlin, Kevin Zimny, Benoit Mascaro, Jacques Leng, Thomas Brunet, Olivier Poncelet, Christophe Aristégui, Olivier Mondain-Monval, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire du Futur (LOF), Université Sciences et Technologies - Bordeaux 1-RHODIA-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-10-LABX-0042,AMADEus,Advanced Materials by Design(2010), ANR-10-IDEX-0003,IDEX BORDEAUX,Initiative d'excellence de l'Université de Bordeaux(2010), Centre National de la Recherche Scientifique (CNRS), CNRS, Rhodia, Lab Future, ANR: ANR-10-LABX-0042-AMADEUS,ANR-10-LABX-0042-AMADEUS, and ANR: ANR-10-IDEX-003-02,IdEx
Subjects: Physical acoustics, Materials science, Acoustic Metamaterials, Field (physics), [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Mechanical Engineering, Acoustics, Gaussian, Metamaterial, General Chemistry, Condensed Matter Physics, Resonator, symbols.namesake, Optics, Transformation (function), Mechanics of Materials, Electromagnetism, symbols, General Materials Science, Ultrasonic sensor, business
Abstract: International audience; Many efforts have been devoted to the design and achievement of negative-refractive-index metamaterials since the 2000s1, 2, 3, 4, 5, 6, 7, 8. One of the challenges at present is to extend that field beyond electromagnetism by realizing three-dimensional (3D) media with negative acoustic indices9. We report a new class of locally resonant ultrasonic metafluids consisting of a concentrated suspension of macroporous microbeads engineered using soft-matter techniques. The propagation of Gaussian pulses within these random distributions of ‘ultra-slow’ Mie resonators is investigated through in situ ultrasonic experiments. The real part of the acoustic index is shown to be negative (up to almost − 1) over broad frequency bandwidths, depending on the volume fraction of the microbeads as predicted by multiple-scattering calculations. These soft 3D acoustic metamaterials open the way for key applications such as sub-wavelength imaging and transformation acoustics, which require the production of acoustic devices with negative or zero-valued indices.
Published: 2014
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