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

页码：9 / 20

页数：12

共 23 条

[21] X-RAY DETERMINATION OF THE MOLECULAR TILT AND LAYER FLUCTUATION PROFILES OF FREELY SUSPENDED LIQUID-CRYSTAL FILMS [J].