HEAT-CAPACITY INVESTIGATIONS OF EXTREMELY THIN LIQUID-CRYSTAL FREESTANDING FILMS

被引：1
|
作者：
HUANG, CC
GEER, R
STOEBE, T
机构：
[1] School of Physics and Astronomy, University of Minnesota, Minneapolis
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1992年 / 212卷
基金：
美国国家科学基金会;
关键词：
HEAT CAPACITY; FREESTANDING FILMS; PHASE TRANSITION; SMECTIC-A-HEXATIC-B;
D O I：
10.1080/10587259208037244
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A high-resolution differential ac free-standing film calorimeter has been constructed in our laboratories. We have employed this unique calorimeter to investigate the evolution of the temperature dependence of heat-capacity anomalies through the smectic-A-hexatic-B-crystal-E transition sequence of one liquid crystal compound as the film thickness is reduced from a few hundred to just three molecular layers. The existence of free surfaces in the free-standing liquid-crystal films has a very strong effect on the development of the molecular order through the smectic-A-hexatic-B transition and other unexpected results related to the crystal-E order. © 1992, Taylor & Francis Group, LLC. All rights reserved.
引用
收藏
页码：9 / 20
页数：12
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