期刊
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
卷 12, 期 6, 页码 297-306出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2007.07.013
关键词
colloidal suspensions; hard spheres; glassy dynamics; caging; nongaussian fluctuations; dynamic heterogeneity; activated barrier hopping
Fundamental understanding of heterogeneous dynamics in concentrated glassy hard sphere fluids and colloidal suspensions, even at the single particle level, requires major theoretical advances. Recent simulations and confocal microscopy experiments suggest strong nongaussian dynamical fluctuation effects and activated transport emerge well before an apparent kinetic glass transition is reached. New theoretical approaches that can predict the observable signatures of intermittent large amplitude motions and the associated fluctuation phenomena are discussed. Comparisons are made with experiments, computer simulations, and prior theory for average dynamical properties. (c) 2007 Elsevier Ltd. All rights reserved.
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