Charge Fluctuations on Membrane Surfaces in Water

Details Charge Fluctuations on Membrane Surfaces in Water Charge Fluctuations on Membrane Surfaces in Water

2000-01-11

arxiv.org/abs/cond-mat/0001151v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevE.62.2981

We generalize the predictions for attractions between over-all neutral surfaces induced by charge fluctuations/correlations to non-uniform systems that include dielectric discontinuities, as is the case for mixed charged lipid membranes in an aqueous solution. We show that the induced interactions depend in a non-trivial way on the dielectric constants of membrane and water and show different scaling with distance depending on these properties. The generality of the calculations also allows us to predict under which dielectric conditions the interaction will change sign and become repulsive.

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