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General theory of tracer-diffussion in colloidal suspensions

Author

Listed:
  • Hernández-Contreras, M.
  • Medina-Noyola, M.
  • Vizcarra-Rendón, A.

Abstract

In this work we derive a generalized Langevin equation that describes the translational Brownian motion of a tracer particle which interacts with other diffusing particles in the system. The direct interactions of the tracer with these other diffusing particles give rise to memory effects described by a time-dependent friction. The main result of this work is a general and exact expression for this friction function which admits the possibility that the tracer is non-spherical, and that the particles diffusing around it are not of a single species, although they are assumed spherical.

Suggested Citation

  • Hernández-Contreras, M. & Medina-Noyola, M. & Vizcarra-Rendón, A., 1996. "General theory of tracer-diffussion in colloidal suspensions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 234(1), pages 271-310.
    • Handle: RePEc:eee:phsmap:v:234:y:1996:i:1:p:271-310
    DOI: 10.1016/S0378-4371(96)00296-8
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    References listed on IDEAS

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    1. Medina-Noyola, M. & Del Rio-Correa, J.L., 1987. "The fluctuation-dissipation theorem for non-Markov processes and their contractions: The role of the stationarity condition," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 146(3), pages 483-505.
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