DIFFUSION AND LIGHT-SCATTERING IN DISPERSIONS OF CHARGED-PARTICLES WITH THIN ELECTRICAL DOUBLE-LAYERS

The perturbation approach of Barker and Henderson is applied to obtain analytical formulae for the collective diffusion coefficient, short-t ime self-diffusion coefficient, sedimentation velocity, static and dyn amic structure factors at low particle concentration. All these quanti ties are expressed as explicit functions of the system parameters (par ticle size and charge, electrolyte concentration, Hamaker constant, et c.) and can be easily calculated if the latter are known. By using lig ht scattering experiments information on the particle charge (or poten tial) and Hamaker constant can be obtained.