Tracer diffusion in concentrated colloidal dispersions. III. Mean squared displacements and self-diffusion coefficients

Abstract

The incoherent dynamic structure factor Fs has been measured on concentrated dispersions of particles with interactions approximating hard spheres. The particle mean squared displacements and self-diffusion coefficients are obtained from Fs at times and scattering vectors where the Gaussian approximation (for Fs ) is expected to be reasonable.