Dynamical Arrest Transition in Nanoparticle Dispersions with Short-Range Interactions

被引：144

作者：

Eberle, Aaron P. R. ^{[1
,2
]}

Wagner, Norman J. ^{[1
,2
]}

Castaneda-Priego, Ramon ^{[1
,2
,3
]}

机构：

[1] Univ Delaware, Ctr Neutron Sci, Newark, DE 19716 USA

[2] Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA

[3] Univ Guanajuato, Div Ciencias & Ingenierias, Leon 37150, Mexico

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 10期

基金：

美国国家科学基金会;

关键词：

HARD-SPHERE MODEL; ADHESIVE SPHERES; BEHAVIOR; PARTICLES; GELATION; SUSPENSIONS; PERCOLATION; INTERFACE; POLYMER; STATES;

D O I：

10.1103/PhysRevLett.106.105704

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the dynamical arrest transition in a model, thermoreversible, adhesive hard sphere dispersion. At low volume fractions phi, below the critical point, gelation occurs within the gas-liquid phase boundary. For phi slightly below and above the critical concentration, the phase boundary follows the predicted percolation transition. At high phi, it melds into the predicted attractive-driven glass transition. Our results demonstrate that for phi above similar to 20% physical gelation is an extension of the attractive-driven glass line and occurs without competition for macroscopic phase separation.

引用

页数：4

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