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Thermal Property Evolution Toward Effectively Two-Dimensional Substrate-Free Systems

Published online by Cambridge University Press:  21 February 2011

R. Geer ,
T. Stoebe ,
C. C. Huang ,
R. Pindak  and
J. Goodby
R. Geer
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455
T. Stoebe
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455
C. C. Huang
Affiliation:
School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455
R. Pindak
Affiliation:
AT&T Bell Laboratory, Murray Hill, N.J. 07974
J. Goodby
Affiliation:
School of Chemistry, The University, Hull HU6 7RX, England
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Abstract

A high-resolution differential quasi-adiabatic calorimeter has been developed to investigate the physical properties of freestanding liquid-crystal films. Our recent heat-capacity studies near the smectic-A-hexatic-B transition of both 65OBC and 46OBC freestanding films clearly demonstrate the evolution towards twodimensional limiting behavior in four-layer films. As the film thickness decreases towards four molecular layers, the heatcapacity anomalies first display separate peaks for the surface and interior transitions and then evolve to one dominated by the surface transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 177: Symposium V – Macromolecular Liquids , 1989 , 299
Copyright
Copyright © Materials Research Society 1990

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