160 articles – 197 references  [version française]
Short view Article in peer-reviewed journal
Gel-phase vesicles buckle into specific shapes
Quéméneur F. et al
Physical Review Letters 108, 10 (2012) 108303 - http://hal.archives-ouvertes.fr/hal-00649424
Attached file list to this document: 
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SolidVesicles.pdf(2.3 MB)
François Quéméneur ()1, 2, Catherine Quilliet ()3, Magalie Faivre ()4, Annie Viallat ()5, Brigitte Pépin-Donat ()1
1:  SPRAM - UMR 5819 - Structures et propriétés d'architectures moléculaire
http://inac.cea.fr/Phocea/Vie_des_labos/Ast/ast_service.php?id_unit=10
CNRS : UMR5819 – Université Joseph Fourier - Grenoble I – CEA : DSM/INAC
SPRAM - UMR 5819, Institut Nanosciences et Cryogénie, CEA/Grenoble, 17 Rue des martyrs 38054 GRENOBLE CEDEX 9
France
2:  Maret Group / Département de Physique
http://hera.physik.uni-konstanz.de/Start.htm
Université de Constance
D-78457 Constance
Germany
3:  LIPhy - Laboratoire Interdisciplinaire de Physique
CNRS : UMR5588 – Université Joseph Fourier - Grenoble I
France
4:  INL - Institut des Nanotechnologies de Lyon - Site de l'INSA
http://inl.cnrs.fr
CNRS : UMR5270 – Ecole Centrale de Lyon – Institut National des Sciences Appliquées [INSA] - Lyon – Université Claude Bernard - Lyon I (UCBL)
7, avenue Jean Capelle 69621 VILLEURBANNE cedex
France
5:  AC - Adhésion et Inflammation
INSERM : U600 – CNRS : UMR6212 – Université de la Méditerranée - Aix-Marseille II
laboratoire d'immunologie 270 Bd de Sainte-Marguerite - BP 29 13274 Marseille Cedex 9
France
Physics/Condensed Matter/Soft Condensed Matter
Gel-phase vesicles buckle into specific shapes
Osmotic deflation of giant vesicles in the rippled gel-phase $P_{\beta '}$ gives rise to a large variety of novel faceted shapes. These shapes are also found from a numerical approach by using an elastic surface model. A shape diagram is proposed based on the model that accounts for the vesicle size and ratios of three mechanical constants: in-plane shear elasticity and compressibility (usually neglected) and out-of-plane bending of the membrane. The comparison between experimental and simulated vesicle morphologies reveals that they are governed by a typical elasticity length, of the order of one micron, and must be described with a large Poisson's ratio.
English

Physical Review Letters
international
2012-03-09
108
10
108303

Buckling – thin shells – capsules – spherical shells – elastic surfaces – Föppl-von Karman – folds – extreme deformations – axisymmetric buckling – elasticity – curvature – in-plane compressibility – stretch modulus – bending modulus – thin plate – gaussian curvature – vesicles – gel-phase vesicles – GUV – DMPC – rippled phase – stomatocyte – discocyte – biconcave – facetted
pacs{46.32.+x ; 87.16.D- ; 87.16.dm}