Electrokinetic Phenomena and Anomalous Conduction

The effects of immobilizing a thin layer of water adjacent to the surface of a colloidal particle are calculated using the Dynamic Stern Layer model introduced by Zukoski and Saville. Supposing water is immobilized by, for example, unreacted monomer or polymer chains dangling from the particle surface allows one to divide the diffuse layer into two regions, an outer region where transport is by convection, electromigration and diffusion and a region near the surface where counterions move only by electromigration and diffusion. The present calculations account for all the relevant processes in a mathematically rigorous fashion. Even a thin layer has dramatic effects in diminishing particle mobility and increasing the dielectric response.