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Short-time rotational diffusion in monodisperse charge-stabilized colloidal suspensions

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  • Watzlawek, M.
  • Nägele, G.

Abstract

We investigate the combined effects of electrostatic interactions and hydrodynamic interactions (HI) on the short-time rotational self-diffusion coefficient Dsr in charge-stabilized suspensions. We calculate Dsr as a function of volume fraction φ for various effective particle charges and various amounts of added electrolyte. The influence of HI is taken into account by a series expansion of the two-body mobility tensors. At sufficiently small φ this is an excellent approximation due to the strong electrostatic repulsion. For larger φ, we also consider the leading hydrodynamic three-body contribution.

Suggested Citation

  • Watzlawek, M. & Nägele, G., 1997. "Short-time rotational diffusion in monodisperse charge-stabilized colloidal suspensions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 235(1), pages 56-74.
    • Handle: RePEc:eee:phsmap:v:235:y:1997:i:1:p:56-74
    DOI: 10.1016/S0378-4371(96)00328-7
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    References listed on IDEAS

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    1. Pusey, P.N. & Van Megen, W. & Underwood, S.M. & Bartlett, P. & Ottewill, R.H., 1991. "Colloidal fluids, crystals and glasses," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 176(1), pages 16-27.
    2. Nägele, G. & Medina-Noyola, M. & Klein, R. & Arauz-Lara, J.L., 1988. "Time-dependent self-diffusion in model suspensions of highly charged Brownian particles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 149(1), pages 123-163.
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