Search

Your search keyword '"Mickaël Huard"' showing total 7 results
Start Over Author "Mickaël Huard"
7 results on '"Mickaël Huard"'

1. Structure in Nascent Carbon Nanotubes Revealed by Spatially Resolved Raman Spectroscopy

Author

Pascale Launois, Valérie Reita, Perine Landois, Mickaël Huard, Nedjma Bendiab, Martine Mayne-L’Hermite, Stéphan Rouzière, Mathieu Pinault, Laboratoire Charles Coulomb (L2C), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Francis PERRIN (LFP - URA 2453), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Edifices Nanométriques (LEDNA), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Optique et microscopies (POM), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Systèmes hybrides de basse dimensionnalité (HYBRID), ANR-07-NANO-0014,ALUCINAN,Utilisation de faisceaux de lumière pour l'analyse in-situ de la croissance par CVD de nanotubes de carbone multi-feuillets(2007), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-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-Institut de Chimie du CNRS (INC)-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-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Optique & Microscopies (NEEL - POM), and Systèmes hybrides de basse dimensionnalité (NEEL - HYBRID)

Subjects
Diffraction, Nanotube, Materials science, Analytical chemistry, Nucleation, chemistry.chemical_element, Aligned-MWNT, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 01 natural sciences, Catalysis, law.invention, symbols.namesake, Condensed Matter::Materials Science, law, Materials Chemistry, mapping, X-Ray microdiffraction, Metals and Alloys, spatially resolved Raman spectroscopy, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry, Chemical physics, symbols, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Particle, 0210 nano-technology, Raman spectroscopy, co-localisation, Carbon
Abstract

The understanding of carbon nanotube (CNT) growth is crucial for the control of their production. In particular, the identification of structural changes of carbon possibly occurring near the catalyst particle in the very early stages of their formation is of high interest. In this study, samples of nascent CNT obtained during nucleation step and samples of vertically aligned CNT obtained during growth step are analysed by combined spatially resolved Raman spectroscopy and X-ray diffraction measurements. Spatially resolved Raman spectroscopy reveals that iron-based phases and carbon phases are co-localized at the same position, and indicates that sp2 carbon nucleates preferentially on iron-based particles during this nucleation step. Depth scan Raman spectroscopy analysis, performed on nascent CNT, highlights that carbon structural organisation is significantly changing from defective graphene layers surrounding the iron-based particles at their base up to multi-walled nanotube structures in the upper part of iron-based particles.

Published
2014

2. Vertically aligned carbon nanotube-based composite: Elaboration and monitoring of the nanotubes alignment

Author

Pascale Launois, Stéphanie Patel, Mickaël Huard, Martine Mayne-L’Hermite, Mathieu Pinault, Florent Roussel, Stéphan Rouzière, Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Francis PERRIN (LFP - URA 2453), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Edifices Nanométriques (LEDNA), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-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-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), 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), 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-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)

Subjects
Nanotube, Materials science, Polymers and Plastics, Composite number, Nanotechnology, Carbon nanotube, composites, law.invention, nanotubes, X-ray, law, graphene and fullerenes, Materials Chemistry, Composite material, Elaboration, chemistry.chemical_classification, General Chemistry, Polymer, Epoxy, Surfaces, Coatings and Films, Characterization (materials science), [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Membrane, chemistry, membranes, visual_art, visual_art.visual_art_medium, microscopy
Abstract

We present the different elaboration steps of a composite formed of carbon nanotubes (CNT) carpet embedded in an epoxy polymer. Detailed characterization at each step of the elaboration process is performed. The good alignment of CNT in as-grown carpets is kept all along the elaboration process of the composite, as it is measured at both macro and microscopic scales by X-ray scattering. We also ensured by X-ray fluorescence measurements that the iron-based catalyst particles used for the synthesis were removed from the carpet after a high temperature post-annealing treatment. These measurements give valuable information for further applications involving unidirectional nanotube composites and membranes, where CNT alignment is a key parameter. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39730.

Published
2014

3. Intracellular fate of carbon nanotubes inside murine macrophages: pH-dependent detachment of iron catalyst nanoparticles

Author

Julien Cambedouzou, Mathieu Pinault, Cyrill Bussy, Mickaël Huard, C. Mory, Sophie Lanone, Murielle Salomé, Jorge Boczkowski, Esther Belade, Pascale Launois, Barbara Fayard, Nathalie Brun, Erwan Paineau, Lucie Armand, INSERM U955, équipe 4, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Nanomedicine laboratory, University College of London [London] (UCL)-Centre for Drug Delivery Research-UCL School of Pharmacy-University College of London [London] (UCL)-Centre for Drug Delivery Research-UCL School of Pharmacy-Institut Mondor de Recherche Biomédicale (IMRB), Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), X-ray Imaging Group, European Synchrotron Radiation Facility (ESRF), Laboratoire Francis PERRIN (LFP - URA 2453), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Mondor de Recherche Biomédicale (IMRB), Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR10-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Service de Physiologie Explorations Fonctionnelles, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Henri Mondor-Service de pneumologie et pathologie professionnelle, Centre Hospitalier Intercommunal de Créteil (CHIC)-Centre Hospitalier Intercommunal de Créteil (CHIC)-Institut Mondor de Recherche Biomédicale (IMRB), Service de pneumologie et pathologie professionnelle, CB and EP respectively acknowledge C'Nano Ile de France and RTRA 'Triangle de la Physique' for financial support of their fellowships. C'Nano-IdF is the nanoscience competence center of Paris Region, supported by CNRS, CEA, MESR, and Région Ile-de-France., BMC, Ed., Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Nanomedicine laboratory, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Health, Toxicology and Mutagenesis, Carbon nanotubes, Metal Nanoparticles, Nanoparticle, Nanotechnology, Spectroscopy, Electron Energy-Loss, 02 engineering and technology, Carbon nanotube, Toxicology, Cathepsin B, Cell Line, law.invention, Nanomaterials, Catalysis, Mice, 03 medical and health sciences, Degradation, Microscopy, Electron, Transmission, X-Ray Diffraction, law, Animals, 030304 developmental biology, 0303 health sciences, Toxicity, Nanotubes, Carbon, Research, Macrophages, Electron energy loss spectroscopy, Lysosome-Associated Membrane Glycoproteins, Spectrometry, X-Ray Emission, General Medicine, Hydrogen-Ion Concentration, 021001 nanoscience & nanotechnology, Fluorescence, Lysosome acidification, Iron catalyst nanoparticles, Transmission electron microscopy, [SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie, Biophysics, [SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie, Macrolides, Lysosomes, 0210 nano-technology, Iron Compounds, Synchrotrons, Intracellular
Abstract

Background Carbon nanotubes (CNT) are a family of materials featuring a large range of length, diameter, numbers of walls and, quite often metallic impurities coming from the catalyst used for their synthesis. They exhibit unique physical properties, which have already led to an extensive development of CNT for numerous applications. Because of this development and the resulting potential increase of human exposure, an important body of literature has been published with the aim to evaluate the health impact of CNT. However, despite evidences of uptake and long-term persistence of CNT within macrophages and the central role of those cells in the CNT-induced pulmonary inflammatory response, a limited amount of data is available so far on the CNT fate inside macrophages. Therefore, the overall aim of our study was to investigate the fate of pristine single walled CNT (SWCNT) after their internalization by macrophages. Methods To achieve our aim, we used a broad range of techniques that aimed at getting a comprehensive characterization of the SWCNT and their catalyst residues before and after exposure of murine macrophages: X-ray diffraction (XRD), High Resolution (HR) Transmission Electron Microscopy (TEM), High Angle Annular Dark Field-Scanning TEM (HAADF-STEM) coupled to Electron Energy Loss Spectroscopy (EELS), as well as micro-X-ray fluorescence mapping (μXRF), using synchrotron radiation. Results We showed 1) the rapid detachment of part of the iron nanoparticles initially attached to SWCNT which appeared as free iron nanoparticles in the cytoplasm and nucleus of CNT-exposed murine macrophages, and 2) that blockade of intracellular lysosomal acidification prevented iron nanoparticles detachment from CNT bundles and protected cells from CNT downstream toxicity. Conclusions The present results, while obtained with pristine SWCNT, could likely be extended to other catalyst-containing nanomaterials and surely open new ways in the interpretation and understanding of CNT toxicity.

Published
2013

4. A molecular 'phase ordering' phase transition leading to a modulated aperiodic composite in n-heptane/urea

Author

Philippe Rabiller, Mickaël Huard, Keith Alquist, Céline Mariette, Shane Nichols, Mark D. Hollingsworth, Bertrand Toudic, Ted Janssen, Claude Ecolivet, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Institute for Theoretical Physics, University of Nijmegen, Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Phase transition, Materials science, Ferroelectricity, Satellites, General Physics and Astronomy, 02 engineering and technology, Crystal structure, 01 natural sciences, Inclusion compound, chemistry.chemical_compound, 0103 physical sciences, Physical and Theoretical Chemistry, 010306 general physics, Heptane, X-ray detectors, 021001 nanoscience & nanotechnology, X-ray diffraction, Radiation detectors, [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, Crystallography, chemistry, Aperiodic graph, Phase transitions, X-ray crystallography, Image reconstruction, Inclusions, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Mercury (element), 0210 nano-technology, Superstructure (condensed matter)
Abstract

International audience; n-Heptane/urea is an aperiodic inclusion compound in which the ratio of host and guest repeats along the channel axis is very close to unity and is found to have a constant value (0.981) from 280 K to 90 K. Below 280 K, two phase transitions are observed. The first (T(c1) = 145 K) is a ferroelastic phase transition that generates superstructure reflections for the host while leaving the guest with 1D order. The second (T(c2) = 130 K) is a "phase ordering" transition to a four-dimensional structure (P2(1)11(0βγ)) with pronounced host-guest intermodulation and a temperature dependent phase shift between guests in adjacent channels.

Published
2012

5. Temperature-pressure phase diagram of an aperiodic host guest compound

Author

Bertrand Toudic, Philippe Bourges, Philippe Rabiller, T.J.B.M. Janssen, Mickaël Huard, Tomasz Breczewski, Claude Ecolivet, L. Bourgeois, Garry J. McIntyre, Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), 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), Institut Laue-Langevin (ILL), ILL, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Faculdad de Ciencias, Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne] (UPV/EHU), Institute for Theoretical Physics, University of Nijmegen, Université de Rennes (UR)-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), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Structural phase, Materials science, Rank (linear algebra), Condensed matter physics, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Symmetry (physics), Aperiodic graph, 0103 physical sciences, Orthorhombic crystal system, PACS 61.50.Ks Crystallographic aspects of phase transformations, pressure effects / 61.05.F- Neutron diffraction and scattering / 61.44.Fw Incommensurate crystals, 010306 general physics, 0210 nano-technology, Composite crystal, Phase diagram, Intermodulation
Abstract

International audience; This letter reports on the structural instabilities of an aperiodic composite crystal under pressure. The (P, T) phase diagram up to 0.55GPa of nonadecane-urea is reported showing various symmetry breakings in crystallographic superspaces, towards three different orthorhombic phases. These structural phase transitions are characterized by a change in the intermodulation and are described by increasing the rank of the crystallographic superspaces.

Published
2011

6. Confined linear molecules inside an aperiodic supramolecular crystal: The sequence of superspace phases in n-hexadecane/urea

Author

Philippe Rabiller, Mickaël Huard, Laurent Guérin, Mark D. Hollingsworth, Claude Ecolivet, Bertrand Toudic, Philippe Bourges, Tomasz Breczewski, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Faculdad de Ciencias, Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne] (UPV/EHU), Department of Chemistry, Kansas State University, National Science Foundation, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay

Subjects
Models, Molecular, crystal structure, inclusions, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], Neutron diffraction, General Physics and Astronomy, 02 engineering and technology, Crystal structure, lattice constants, Crystallography, X-Ray, 01 natural sciences, Inclusion compound, Crystal, chemistry.chemical_compound, Lattice constant, neutron diffraction, Phase (matter), Alkanes, 0103 physical sciences, Urea, PACS 61.66.Hq Organic compounds / 81.10.Dn Growth from solutions / 61.72.Qq Microscopic defects (voids, inclusions, etc.), Physical and Theoretical Chemistry, 010306 general physics, crystallography, space groups, Chemistry, Temperature, Space group, 021001 nanoscience & nanotechnology, X-ray diffraction, Crystallography, Orthorhombic crystal system, Crystallization, 0210 nano-technology, crystal growth from solution, organic compounds
Abstract

International audience; High-resolution studies of the host-guest inclusion compound n-hexadecane/urea are reported at atmospheric pressure, using both cold neutrons and x-ray diffraction. This intergrowth crystal presents a misfit parameter, defined by the ratio c(h)/c(g) (c(host)/c(guest)), which is temperature independent and irrational (γ = 0.486 ± 0.002) from 300 to 30 K. Three different structural phases are reported for this aperiodic crystal over this temperature range. The crystallographic superspaces are of rank 4 in phases I and II, whereas phase III is associated with an increase in rank to 5, with a supplementary misfit parameter (δ = 0.058 ± 0.002) that is constant throughout this phase. The superspace group of phase I is hexagonal P6(1)22(00γ) down to T(c1) = 149.5 ± 0.5 K; phase II, which persists down to T(c2) = 127.8 ± 0.5 K is orthorhombic P2(1)2(1)2(1)(00γ), and phase III is orthorhombic P2(1)2(1)2(1)(00γ)(00δ).

Published
2011

Catalog

Books, media, physical & digital resources
See catalog results