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(49) Production(s) de l'année 2021
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On the structure of amorphous systems: More order than expected 
Auteur(s): Kob W.
Conférence invité: Journées de la Matière Condensée 17 (Rennes, FR, 2021-08-24)
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On the structure of amorphous systems on intermediate and large length scales
Auteur(s): Kob W.
Conférence invité: Local structure meets machine learning in soft matter systems (Lausanne, CH, 2021-06-28)
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Nanocomposites and Gels: Insight from atomistic Simulations
Auteur(s): Kob W.
(Séminaires)
Institute of Natural Sciences, Shanghai Jiao Tong University (Shanghai, CN), 2021-05-18 |
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Dense Phases of γ-Gliadins in Confined Geometries
Auteur(s): Banc A., Navailles Laurence, Leng Jacques, Renard Denis
(Article) Publié:
Colloids And Interfaces, vol. 5 p.51 (2021)
Texte intégral en Openaccess : 
Ref HAL: hal-03443023_v1
DOI: 10.3390/colloids5040051
Exporter : BibTex | endNote
Résumé: The binary phase diagram of γ-gliadin, a wheat storage protein, in water was explored thanks to the microevaporator, an original PDMS microfluidic device. This protein, usually qualified as insoluble in aqueous environments, displayed a partial solubility in water. Two liquid phases, a very dilute and a dense phase, were identified after a few hours of accumulation time in the microevaporator. This liquid–liquid phase separation (LLPS) was further characterized through in situ micro-Raman spectroscopy of the dilute and dense protein phases. Micro-Raman spectroscopy showed a specific orientation of phenylalanine residues perpendicular to the PDMS surfaces only for the diluted phase. This orientation was ascribed to the protein adsorption at interfaces, which would act as nuclei for the growth of dense phase in bulk. This study, thanks to the use of both aqueous solvent and a microevaporator, would provide some evidence for a possible physicochemical origin of the gliadin assembly in the endoplasmic reticulum of albumen cells, leading to the formation of dense phases called protein bodies. The microfluidic tool could be used also in food science to probe protein–protein interactions in order to build up phase diagrams
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Cooperative excitations in superionic PbF2
Auteur(s): Mohn C. e., Krynski M., Kob W., Allen N. l.
(Article) Publié:
Philosophical Transactions Of The Royal Society Of London. Series A, Containing Papers Of A Mathematical Or Physical Character, vol. 379 p.20190455 (2021)
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Graphite nanoplatelets filled silicone composites with novel electrical and dielectric properties
Auteur(s): Metz R., Blanc C., Prevot G., Hassanzadeh Mehrdad
(Article) Publié:
Journal Of Materials Science-Materials In Electronics, vol. 32 p.26608-26619 (2021)
Texte intégral en Openaccess :
Ref HAL: hal-03419440_v1
DOI: 10.1007/s10854-021-07037-4
WoS: WOS:000704940000007
Exporter : BibTex | endNote
Résumé: In the design of medium and low voltage equipment such as cable accessories, generator, motor end windings or bushings, issues with electrical field enhancement occur at interfaces between insulators and conductors, resulting in accelerated material ageing. The purpose of this paper is to present a novel dielectric composite material which has the properties to mitigate this local amplification. It is a functional dielectric which resistivity decreases by several orders with electric field from 10(14) to 10(9) ohm m up to 1 kV mm(-1) while the dielectric constant decreases from 15 to 12 in the 10(-2)-10(6) Hz range. This novel material is made with graphite nanoplatelets. It may be used as a resistive or capacitive field grading material in electrical applications.
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