Self-Diffusion of Interacting Colloids Far from Equilibrium

Phys. Rev. Lett. 61, 2554 – Published 28 November 1988
Xia Qiu, H. Daniel Ou-Yang, D. J. Pine, and P. M. Chaikin


Forced Rayleigh scattering is used to measure the self-diffusion of charged polyball suspensions driven far from equilibrium by an oscillating shear flow. Aside from the usual enhancement of the diffusion due to Taylor dispersion, we observe an additional isotropic contribution which increases linearly with the shear rate. This anomalous contribution is absent in noninteracting samples and increases monotonically with the interparticle interaction strength.


  • Received 22 August 1988
  • Published in the issue dated 28 November 1988

© 1988 The American Physical Society

Authors & Affiliations

Xia Qiu1,2, H. Daniel Ou-Yang1,2, D. J. Pine2,3, and P. M. Chaikin2,4

  • 1Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104
  • 2Exxon Research and Engineering Laboratory, Annandale, New Jersey 08802
  • 3Department of Physics, Haverford College, Haverford, Pennsylvania 19041
  • 4Department of Physics, Princeton University, Princeton, New Jersey 08534

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