Heat capacity measurements of extremely thin substrate-free liquid-crystal films

T. Stoebe, J. T. Ho, C. C. Huang

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

A state-of-the-art calorimetric system has been established. The system enables us to measure simultaneously heat capacity and optical reflectivity of free-standing liquid-crystal films from many hundreds down to only two molecular layers in thickness. Our experimental results on the smectic-A-hexatic-B and smectic-C-smectic-I transitions cannot be described solely in terms of the creation of bond-orientational order, indicating that additional molecular order must be present in the hexatic phases of liquid crystals.

Original languageEnglish (US)
Pages (from-to)1189-1197
Number of pages9
JournalInternational Journal of Thermophysics
Volume15
Issue number6
DOIs
StatePublished - Nov 1 1994

Keywords

  • calorimeter
  • density
  • film
  • heat capacity
  • hexatic
  • liquid crystal
  • smectic-A-hexatic-B transition
  • two-dimensional melting

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