Self-Diffusion of Interacting Colloids Far from Equilibrium

Xia Qiu; H. Daniel Ou-Yang; D. J. Pine; P. M. Chaikin

doi:10.1103/PhysRevLett.61.2554

Self-Diffusion of Interacting Colloids Far from Equilibrium

Xia Qiu, H. Daniel Ou-Yang, D. J. Pine, and P. M. Chaikin

Phys. Rev. Lett. 61, 2554 – Published 28 November 1988

Abstract

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

DOI:https://doi.org/10.1103/PhysRevLett.61.2554

Authors & Affiliations

Xia Qiu^1,2, H. Daniel Ou-Yang^1,2, D. J. Pine^2,3, and P. M. Chaikin^2,4

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