Structure formation in binary mixtures of surfactants: vesicle opening-up to bicelles and octopus-like micelles

Abstract

Micelle formation in binary mixtures of surfactants is studied using a coarse-grained molecular simulation. When a vesicle composed of lipid and detergent types of molecules is ruptured, a disk-shaped micelle, the bicelle, is typically formed. It is found that cup-shaped vesicles and bicelles connected with worm-like micelles are also formed depending on the surfactant ratio and critical micelle concentration. The obtained octopus shape of micelles agree with those observed in the cryo-TEM images reported in [S. Jain and F. S. Bates, Macromol. 37, 1511 (2004).]. Two types of connection structures between the worm-like micelles and the bicelles are revealed.

11 pages, 13 figures

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Cited by in corpus (11)

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• Cup-to-vesicle transition of a fluid membrane with spontaneous curvature
• Mechanical properties and microdomain separation of fluid membranes with anchored polymers
• Structure formation in binary mixtures of lipids and detergents: Self-assembly and vesicle division
• Construction of nuclear envelope shape by a high-genus vesicle with pore-size constraint
• Shape transitions of high-genus fluid vesicles
• Membrane domain formation induced by binding/unbinding of curvature-inducing molecules onto both membrane surfaces
• Disk-shaped bicelles in block copolymer/homopolymer blends
• Spatiotemporal pattern formation of membranes induced by surface molecular binding/unbinding