Correlations of structure and dynamics in an aging colloidal glass

被引：35

作者：

Cianci, Gianguido C. ^{[1
]}

Courtland, Rachel E. ^{[1
]}

Weeks, Eric R. ^{[1
]}

机构：

[1] Emory Univ, Dept Phys, Atlanta, GA 30322 USA

来源：

SOLID STATE COMMUNICATIONS | 2006年 / 139卷 / 11-12期

基金：

美国国家航空航天局;

关键词：

disordered systems; order-disorder effects; phase transitions;

D O I：

10.1016/j.ssc.2006.04.039

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study concentrated colloidal suspensions, a model system which has a glass transition. Samples in the glassy state show aging, in that the motion of the colloidal particles slows as the sample ages from an initial state. We study the relationship between the static structure and the slowing dynamics, using confocal microscopy to follow the three-dimensional motion of the particles. The structure is quantified by considering tetrahedra formed by quadruplets of neighboring particles. We find that while the sample clearly slows down during aging, the static properties as measured by tetrahedral quantities do not vary. However, a weak correlation between tetrahedron shape and mobility is observed, suggesting that the structure facilitates the motion responsible for the sample aging. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：599 / 604

页数：6

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