Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids

by: PN Segrè, SP Meeker, PN Pusey, WCK Poon

Physical Review Letters, Vol. 75 (31 July 1995), 958.

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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.

@article{citeulike:1449849, 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.}, author = {Segr\`{e}, P. N. and Meeker, S. P. and Pusey, P. N. and Poon, W. C. K. }, citeulike-article-id = {1449849}, doi = {http://dx.doi.org/10.1103/PhysRevLett.75.958}, journal = {Physical Review Letters}, keywords = {colloids, edinburgh, relaxation, shear, viscosity}, month = {July}, pages = {958+}, posted-at = {2008-08-05 00:06:20}, priority = {2}, publisher = {American Physical Society}, title = {Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids}, url = {http://dx.doi.org/10.1103/PhysRevLett.75.958}, volume = {75}, year = {1995} }

RIS record

TY - JOUR ID - citeulike:1449849 L3 - citeulike-article-id:1449849 N2 - 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. JF - Physical Review Letters TI - Viscosity and Structural Relaxation in Suspensions of Hard-Sphere Colloids PB - American Physical Society VL - 75 SP - 958 KW - colloids KW - edinburgh KW - relaxation KW - shear KW - viscosity AU - Segrè, PN AU - Meeker, SP AU - Pusey, PN AU - Poon, WCK PY - 1995/07/31/ UR - http://dx.doi.org/10.1103/PhysRevLett.75.958 ER -

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