Publikation: Dynamical test of interaction potentials for colloidal suspensions
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An analytical formula for the ratio between the long- and short-time self-diffusion coefficirnt DL/DS is presented as a result of extensive Brownian dynamics simulations for Yukawa systems. In addition, forced Rayleigh scattering experiments are performed to determine DL/DS for suspensions of highly charged latex spheres with a variable low volume fraction immersed in electrolytes of variable concentration. Experimantal parameters were precisely controlled using advanced preparational methods. Comparing experimental data to the analytical formula we perform a sensitive dynamical test of Yukawa models for the interaction potential. The observed quantitative agreement provides strong evidence for the validity of the renormalization procedures suggested within the Poisson-Boltzmann cell model. Deviations observed for the Dejarguin-Landau-Verwey-Overbeek potential and other models are discussed.
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BITZER, Franz, Thomas PALBERG, Hartmut LÖWEN, Rolf SIMON, Paul LEIDERER, 1994. Dynamical test of interaction potentials for colloidal suspensions. In: Physical Review E. 1994, 50, pp. 2821-2826. Available under: doi: 10.1103/PhysRevE.50.2821BibTex
@article{Bitzer1994Dynam-5353, year={1994}, doi={10.1103/PhysRevE.50.2821}, title={Dynamical test of interaction potentials for colloidal suspensions}, volume={50}, journal={Physical Review E}, pages={2821--2826}, author={Bitzer, Franz and Palberg, Thomas and Löwen, Hartmut and Simon, Rolf and Leiderer, Paul} }
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