Heat capacity investigations of extremely thin liquid-crystal free-standing films

C. C. Huang, R. Geer, T. Stoebe

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)9-20
Number of pages12
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Volume212
Issue number1
DOIs
StatePublished - Feb 1 1992

Keywords

  • free-standing films
  • heat capacity
  • phase transition
  • smectic-A-hexatic-B

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