DYNAMIC LIGHT-SCATTERING STUDY OF NEMATIC AND SMECTIC-A LIQUID-CRYSTAL ORDERING IN SILICA AEROGEL

被引：130
|
作者：
BELLINI, T
CLARK, NA
SCHAEFER, DW
机构：
[1] UNIV COLORADO,DEPT PHYS,CONDENSED MATTER LAB,BOULDER,CO 80309
[2] SANDIA NATL LABS,ALBUQUERQUE,NM 87185
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.74.2740
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The dynamical behavior of nematic and smectic- A ordering of a liquid crystal in an aerogel host is studied by quasielastic light scattering. In the nematic phase, ordered domains are comparable to the pore size and generally frozen in orientation, with remnant orientation fluctuations having paranematic dynamics for a domain size distribution appropriate to the aerogel, and the coupling between domains giving rise to an additional slow glasslike relaxation. At lower temperatures a drastic slowing down, connected with a local nematic-to-smectic- A transformation, is observed. © 1995 The American Physical Society.
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页码：2740 / 2743
页数：4
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