Shear-induced formation of vesicles in membrane phases: kinetics and size selection mechanisms, elasticity versus surface tension.
Multilamellar vesicles can be formed upon shearing lamellar phases (L(alpha)) and phase-separated lamellar-sponge (L(alpha)/L(3)) mixtures. In the first case, the vesicle volume fraction is always 100% and the vesicle size is monitored by elasticity ("onion textures"). In the second system the vesicle volume fraction can be tuned from 0 to 100% and the mean size results from a balance between capillary and viscous forces ("Taylor droplets"). However, despite these differences, in both systems we show that the formation of vesicles is a strain-controlled process monitored by a universal primary buckling instability of the lamellae.
Centre de Physique Moléculaire Optique et Hertzienne, UMR 5798, Université Bordeaux I, 351 Cours de la Libération, 33400 Talence, France.
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D004143:Dioctyl Sulfosuccinic Acid; D004548:Elasticity; D007700:Kinetics; D008051:Lipid Bilayers / Q000138:chemical synthesis / Q000737:chemistry*; D008081:Liposomes / Q000138:chemical synthesis / Q000737:chemistry*; D046911:Macromolecular Substances; D008560:Membrane Fluidity; D008567:Membranes, Artificial; D008968:Molecular Conformation; D010316:Particle Size; D044367:Phase Transition; D033081:Shear Strength; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013386:Succinates / Q000737:chemistry; D013500:Surface Tension
D008051:Lipid Bilayers; D008081:Liposomes; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D013386:Succinates; D004143:Dioctyl Sulfosuccinic Acid; D012967:Sodium Dodecyl Sulfate