title: Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions.
abstract: Theoretical calculations for colloidal charge-stabilized suspensions and hard-sphere suspensions show that hydrodynamic interactions yield a qualitatively different particle concentration dependence of the short-time self-diffusion coefficient. The effect, however, is numerically small and hardly accessible by conventional light-scattering experiments. By applying multiple-scattering decorrelation equipment and a careful data analysis we show that the theoretical prediction for charged particles is in agreement with our experimental results from aqueous polystyrene latex suspensions.
authors.affiliation: Institut für Physik der Johannes-Gutenberg-Universität, 55099 Mainz, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Overbeck
authors.forename: C
authors.initials: C
authors.lastname: Sinn
authors.forename: M
authors.initials: M
authors.lastname: Watzlawek