Heat Capacity Investigations of Extremely Thin Liquid-Crystal Free-Standing Films
作者:
C.C. Huang,
R. Geer,
T. Stoebe,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1992)
卷期:
Volume 212,
issue 1
页码: 9-20
ISSN:1058-725X
年代: 1992
DOI:10.1080/10587259208037244
出版商: Taylor & Francis Group
关键词: heat capacity;free-standing films;phase transition;smectic-A-hexatic-B
数据来源: Taylor
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.
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