Europhys. Lett., 63 (3) , pp. 381-387 (2003)
Local dielectric permittivity near an interfaceV. Ballenegger and J.-P. Hansen
Department of Chemistry, University of Cambridge - Cambridge CB2 1EW, UK
(Received 21 March 2003; accepted in final form 4 June 2003)
A statistical mechanics expression is derived for the space-dependent dielectric permittivity of a polar solvent near an interface. The asymptotic behaviour of this local permittivity is calculated in the low-density limit, near a planar interface. The potential of mean force between two ions is shown to agree with the prediction of macroscopic electrostatics for large separations parallel to the interface.
61.20.Gy - Theory and models of liquid structure.
77.22.Ch - Permittivity (dielectric function).
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