A MEAN FIELD-THEORY FOR FLUIDS OF MULTIPOLAR PARTICLES IN CONTACT WITH A POLARIZABLE WALL

Fluids of multipolar particles in contact with a semi-infinite polarizable hard wall are considered. A mean field theory which reduces the many-body electrostatic wall-solvent interactions to an effective pair potential is described. The effective potential can be employed in conjunction with the reference hypernetted-chain approximation, or some other integral equation theory, to obtain a self-consistent solution for the wall-solvent correlation function and hence the solvent structure at the interface. Explicit results are given for dipolar hard sphere fluids in contact with walls having dielectric constants ranging from 1 to infinity. For this system, it is shown that contributions to the wall-solvent potential from images of other particles are very important and act strongly against the direct "self-image" interaction.