Domain Growth, Budding, and Fission in Phase Separating Self-Assembled Fluid Bilayers

Details Domain Growth, Budding, and Fission in Phase Separating Self-Assembled Fluid Bilayers Domain Growth, Budding, and Fission in Phase Separating Self-Assembled Fluid Bilayers

2006-02-02

arxiv.org/abs/cond-mat/0602051v1

Journal of Chemical Physics, Vol 123, 224902 (2005)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

A systematic investigation of the phase separation dynamics in self-assembled multi-component bilayer fluid vesicles and open membranes is presented. We use large-scale dissipative particle dynamics to explicitly account for solvent, thereby allowing for numerical investigation of the effects of hydrodynamics and area-to-volume constraints. In the case of asymmetric lipid composition, we observed regimes corresponding to coalescence of flat patches, budding, vesiculation and coalescence of caps. The area-to-volume constraint and hydrodynamics have a strong influence on these regimes and the crossovers between them. In the case of symmetric mixtures, irrespective of the area-to-volume ratio, we observed a growth regime with an exponent of 1/2. The same exponent is also found in the case of open membranes with symmetric composition.

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