Critical swelling of particle-encapsulating vesicles

Details Critical swelling of particle-encapsulating vesicles Critical swelling of particle-encapsulating vesicles

2008-02-11

arxiv.org/abs/0802.1422v2

Phys. Rev. Lett. 101, 078104 (2008)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.101.078104

We consider a ubiquitous scenario where a fluctuating, semipermeable vesicle is embedded in solution while enclosing a fixed number of solute particles. The swelling with increasing number of particles or decreasing concentration of the outer solution exhibits a continuous phase transition from a fluctuating state to the maximum-volume configuration, whereupon appreciable pressure difference and surface tension build up. This criticality is unique to particle-encapsulating vesicles, whose volume and inner pressure both fluctuate. It implies a universal swelling behavior of such vesicles as they approach their limiting volume and osmotic lysis.

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