Hydration forces as a result of non-local water polarizability

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Abstract

A macroscopic theory of exponential repulsion between lipid membranes (hydration forces) is proposed. The theory is based on non-local water electrostatics and generalizes the Gouy-Chapman theory of the electric double layer for the case of surfaces carrying dipoles. Considerable deviations of the electrolyte screening length from its Debye value for biologically relevant ion concentrations are predicted.

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