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Your search keyword '"Pascale Launois"' showing total 12 results
Start Over Author "Pascale Launois" Publisher international union of crystallography (iucr)
12 results on '"Pascale Launois"'

3. Intercalated water in multi-layered graphene oxide paper: an X-ray scattering study

Author

Jesús David Núñez, Wolfgang K. Maser, Erwan Paineau, Ana M. Benito, Pascale Launois, Stéphan Rouzière, Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), Gobierno de Aragón, European Commission, Paineau, Erwan [0000-0002-6776-7201], Benito, Ana M. [0000-0002-8654-7386], Maser, Wolfgang K. [0000-0003-4253-0758], Launois, Pascale [0000-0003-4314-1076], Paineau, Erwan, Benito, Ana M., Maser, Wolfgang K., Launois, Pascale, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Instituto de Carboquimica (CSIC), and Instituto de Carboquimica

Subjects
Materials science, Vapour pressure of water, Oxide, Analytical chemistry, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, law.invention, chemistry.chemical_compound, law, Bound water, Wide-angle X-ray scattering, ComputingMilieux_MISCELLANEOUS, Graphene oxide, Graphene oxide paper, Scattering, Graphene, Water, [CHIM.MATE]Chemical Sciences/Material chemistry, Atmospheric temperature range, 021001 nanoscience & nanotechnology, 6. Clean water, 0104 chemical sciences, chemistry, WAXS, X-ray scattering modelling, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology
Abstract

X-ray scattering (XRS) experiments have been performed on multi-layered graphene oxide (GO) paper. GO can be easily hydrated as water naturally intercalates in the hydro­philic nanostructure. The effect of the intercalated water on the XRS signals is measured during dehydration under thermal treatment in the temperature range 298–473 K as well as during hydration under saturated water vapour pressure. A simple modelling of the XRS signals by taking into account the presence and the type of intercalated water (bound water or physisorbed water) is introduced. It allows an explanation of the variations of intensity and position of XRS reflections observed experimentally., EP, SR and PL benefited of a grant from the French Research National Agency under the program Investissements d’Avenir (SEDECO project, ANR-10-LABX-0035: Labex NanoSa-clay). AMB and WKM acknowledge funding from the Spanish Ministry MINECO under projects ENE2013-48816-C5-5-R and ENE2016-79282-C5-1-R with their associated European Regional Development Funds, and from the Government of Aragon under Consolidated Group programme DGA-T66-GCNN and the associated European Social Fund.

Published
2017
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4. MOMAC: a SAXS/WAXS laboratory instrument dedicated to nanomaterials

Author

M. Amara, Benjamin Abécassis, Olivier Spalla, Blaise Fleury, Stéphan Rouzière, Olivier Taché, Philippe Joly, Antoine Thill, Pascale Launois, 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-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), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), 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), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Nanomaterials, law.invention, Optics, law, Wide-angle X-ray scattering, Small-angle X-ray scattering, business.industry, Scattering, Detector, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Characterization (materials science), small-angle X-ray scattering, SAXS/WAXS, laboratory instruments, nanoparticles, Vacuum chamber, 0210 nano-technology, business, wide-angle X-ray scattering
Abstract

This article presents the technical characteristics of a newly built small- and wide-angle X-ray scattering (SAXS/WAXS) apparatus dedicated to structural characterization of a wide range of nanomaterials in the powder or dispersion form. The instrument is based on a high-flux rotating anode generator with a molybdenum target, enabling the assessment of highly absorbing samples containing heavy elements. The SAXS part is composed of a collimation system including a multilayer optic and scatterless slits, a motorized sample holder, a vacuum chamber, and a two-dimensional image-plate detector. All the control command is done through a TANGO interface. Normalization and data correction yield scattering patterns at the absolute scale automatically with a q range from 0.03 to 3.2 Å−1. The WAXS part features a multilayer collimating optic and a two-dimensional image-plate detector with variable sample-to-detector distances. The accessible q range is 0.4–9 Å−1, ensuring a large overlap in q range between the two instruments. A few examples of applications are also presented, namely coupled SAXS/WAXS structure and symmetry determination of gold nanocrystals in solution and characterization of imogolite nanotubes and iron-filled carbon nanotube samples.

Published
2016
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5. Structural resolution of inorganic nanotubes with complex stoichiometry

Author

Pascale Launois, Geoffrey Monet, Amara, Erwan Paineau, and Stéphan Rouzière

Subjects
Inorganic Chemistry, Materials science, Structural Biology, Resolution (electron density), Analytical chemistry, General Materials Science, Physical and Theoretical Chemistry, Condensed Matter Physics, Biochemistry, Stoichiometry
Published
2018
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12. Phase transitions in quasicrystals

Author

M. Lambert, Pascale Launois, and F. Dénoyer

Subjects
Quantum phase transition, Phase transition, Materials science, Condensed matter physics, Structural Biology, Laminar-turbulent transition, Ferroics, Quasicrystal
Published
1993
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