DYNAMICS OF ELECTRICAL DOUBLE-LAYER FORMATION AT A CHARGED SOLID-SURFACE

A theoretical study of the dynamics of electrical double layer formati on near a charged solid surface is presented. A microscopic expression for the time dependent inhomogeneous charge density of an ionic solut ion next to a newly charged surface is derived by using linear respons e theory and molecular hydrodynamics. The presence of interionic corre lations is included through ionic structure factors. The rate of elect rical double layer formation is found to depend rather strongly on ion concentration and on the dielectric constant of the medium. It is als o found that the formation of double layer becomes slower with increas e in distance from the charged surface. (C) 1998 Elsevier Science B.V.