Gel phase vesicles buckle into specific shapes |
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Authors: | Quemeneur François Quilliet Catherine Faivre Magalie Viallat Annie Pépin-Donat Brigitte |
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Affiliation: | UMR5819 SPrAM (CEA-CNRS-Univ. Grenoble)/INAC/CEA-Grenoble, France. |
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Abstract: | Osmotic deflation of giant vesicles in the rippled gel phase P(β') 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 1 μm, and must be described with a large Poisson's ratio. |
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