Leaky Membrane Dynamics

Details Leaky Membrane Dynamics Leaky Membrane Dynamics

2010-02-01

arxiv.org/abs/1002.0344v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, contains responses to referees

Scientific paper

A concentration difference of particles across a membrane perforated by pores will induce a diffusive flux. If the diffusing objects are of the same length scale as the the pores, diffusion may not be simple, objects can move into the pore in a configuration that requires them to back up in order to continue forward. A configuration that blocks flow through the pore may be statistically preferred, an attracting metastable state of the system. This effect is purely kinetic, and not dependent on potentials, friction or dissipation. We discuss several geometries which generate this effect, and introduce a heuristic model which captures the qualitative features.

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