Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids

P. N. Segrè, S. P. Meeker, P. N. Pusey, and W. C. K. Poon
Phys. Rev. Lett. 75, 958 – Published 31 July 1995
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Abstract

Viscometry and dynamic light scattering (DLS) were used to study suspensions of colloidal particles which interact like hard spheres. The rate of “structural relaxation” of microscopic density fluctuations, indicated by the long-time diffusion coefficient measured by DLS at the peak of the static structure factor, was found to vary with particle concentration quantitatively like the inverse of the low-shear-rate viscosity. Sample concentrations were calibrated with respect to the thermodynamic “freezing” transition of the suspension.

  • Received 2 March 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.958

©1995 American Physical Society

Authors & Affiliations

P. N. Segrè, S. P. Meeker, P. N. Pusey, and W. C. K. Poon

  • Department of Physics and Astronomy, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom

Comments & Replies

Comment on “Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids”

I. M. de Schepper, E. G. D. Cohen, and R. Verberg
Phys. Rev. Lett. 77, 584 (1996)

Segrè etal. Reply:

P. N. Segrè, S. P. Meeker, P. N. Pusey, and W. C. K. Poon
Phys. Rev. Lett. 77, 585 (1996)

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Vol. 75, Iss. 5 — 31 July 1995

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