Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

Details Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions Enhanced structural correlations accelerate diffusion in charge-stabilized colloidal suspensions

1999-04-28

arxiv.org/abs/cond-mat/9904412v1

Phys. Rev. E 60, 1936 (1999)

Physics

Condensed Matter

Soft Condensed Matter

1 ps-file (MS-Word), 14 pages

Scientific paper

10.1103/PhysRevE.60.1936

Theoretical calculations for colloidal charge-stabilized 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. 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.

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