Attractive instability of oppositely charged membranes induced by charge density fluctuations

Details Attractive instability of oppositely charged membranes induced by charge density fluctuations Attractive instability of oppositely charged membranes induced by charge density fluctuations

2004-02-17

arxiv.org/abs/cond-mat/0402455v2

Phys. Rev. Lett. 93, 138101 (2004)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.93.138101

We predict the conditions under which two oppositely charged membranes show a dynamic, attractive instability. Two layers with unequal charges of opposite sign can repel or be stable when in close proximity. However, dynamic charge density fluctuations can induce an attractive instability and thus facilitate fusion. We predict the dominant instability modes and timescales and show how these are controlled by the relative charge and membrane viscosities. These dynamic instabilities may be the precursors of membrane fusion in systems where artificial vesicles are engulfed by biological cells of opposite charge.

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