A density functional theory for dipolar hard spheres at charged solid-liquid interfaces

In this article we present the application of a recently developed density functional theory for dipolar fluids to the case of dipolar hard sphere particles in contact with charged walls. We use simplifying local approximations to the electrostatic contributions to the free energy and also in an effective potential representation of dipole-dipole orientational correlations. Density and polarization profiles are obtained. We also calculate solvation forces and capacitances between two charged walls, finding significant solvent structure effects in both quantities.