Surface induced glass transition in a confined molecular liquid

被引：41

作者：

Richert, R ^{[1
]}

Yang, M ^{[1
]}

机构：

[1] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2003年 / 107卷 / 04期

关键词：

D O I：

10.1021/jp022039r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structural relaxation of a glass-forming simple liquid, 3-methylpentane, is studied by triplet state solvation dynamics as a function of the distance from the surface in porous silica. By bonding the optical probes to the pore surface, we observe interfacial dynamics which are 3 orders of magnitude slower compared with the bulk, equivalent to a surface induced glass transition. Consistent with length scales of cooperativity, these effects disappear for distances from the surface exceeding a few nanometers.

引用

页码：895 / 898

页数：4

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