Contribution of Slow Clusters to the Bulk Elasticity Near the Colloidal Glass Transition

by: Jacinta C Conrad, Param P Dhillon, Eric R Weeks, David R Reichman, David A Weitz

Physical Review Letters, Vol. 97, No. 26. (2006)

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Abstract

We use confocal microscopy to visualize individual particles near the colloidal glass transition. We identify the most slowly-relaxing particles and show that they form spatially correlated clusters that percolate across the sample. In supercooled fluids, the largest cluster spans the system on short time scales but breaks up on longer time scales. In contrast, in glasses, a percolating cluster exists on all accessible time scales. Using molecular dynamics simulation, we show that these clusters make the dominant contribution to the bulk elasticity of the sample.

@article{conrad06, abstract = {We use confocal microscopy to visualize individual particles near the colloidal glass transition. We identify the most slowly-relaxing particles and show that they form spatially correlated clusters that percolate across the sample. In supercooled fluids, the largest cluster spans the system on short time scales but breaks up on longer time scales. In contrast, in glasses, a percolating cluster exists on all accessible time scales. Using molecular dynamics simulation, we show that these clusters make the dominant contribution to the bulk elasticity of the sample.}, author = {Conrad, Jacinta C. and Dhillon, Param P. and Weeks, Eric R. and Reichman, David R. and Weitz, David A. }, citeulike-article-id = {1567407}, doi = {http://dx.doi.org/10.1103/PhysRevLett.97.265701}, journal = {Physical Review Letters}, keywords = {colloids, confocal, elasticity, glass, pmma, slow-particles}, number = {26}, posted-at = {2007-09-19 14:47:56}, priority = {0}, publisher = {APS}, title = {Contribution of Slow Clusters to the Bulk Elasticity Near the Colloidal Glass Transition}, url = {http://dx.doi.org/10.1103/PhysRevLett.97.265701}, volume = {97}, year = {2006} }

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TY - JOUR ID - conrad06 L3 - citeulike-article-id:1567407 TI - Contribution of Slow Clusters to the Bulk Elasticity Near the Colloidal Glass Transition JF - Physical Review Letters VL - 97 IS - 26 PB - APS N2 - We use confocal microscopy to visualize individual particles near the colloidal glass transition. We identify the most slowly-relaxing particles and show that they form spatially correlated clusters that percolate across the sample. In supercooled fluids, the largest cluster spans the system on short time scales but breaks up on longer time scales. In contrast, in glasses, a percolating cluster exists on all accessible time scales. Using molecular dynamics simulation, we show that these clusters make the dominant contribution to the bulk elasticity of the sample. KW - colloids KW - confocal KW - elasticity KW - glass KW - pmma KW - slow-particles AU - Conrad, Jacinta AU - Dhillon, Param AU - Weeks, Eric AU - Reichman, David AU - Weitz, David PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.97.265701 ER -

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