Molecular dynamics in confining space: From the single molecule to the liquid state

被引：167

作者：

Huwe, A

Kremer, F ^{[1
]}

Behrens, P

Schwieger, W

机构：

[1] Univ Leipzig, Dept Phys, D-04103 Leipzig, Germany

[2] Univ Hannover, Dept Chem, D-30167 Hannover, Germany

[3] Univ Halle Wittenberg, Dept Chem, D-06108 Halle, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.82.2338

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The transition from the dynamics of isolated molecules to that of a bulk liquid is observed for the first time by analyzing the dielectric relaxation (10(-2)-10(9) Hz) of ethylene glycol (EG) guest molecules confined to zeolitic host systems of different topology. Beyond a threshold channel size the liquid character is lost, indicated by a dramatically increased relaxation rate and an Arrhenius-like temperature dependence. Computer simulations of the molecular arrangement in a confining space prove that an ensemble as small as six molecules is sufficient to exhibit the dynamics of a bulk liquid.

引用

页码：2338 / 2341

页数：4

共 34 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].