Interfacial tension of a polymesomorphic liquid crystal bounded by an isotropic liquid

A. K. George, K. P. Mohandas

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Abstract

A spinning-drop technique was used to study the thermal variation in the surface tension at a liquid crystal-isotropic liquid interface. A polymesomorphic liquid crystal with nematic and smectic A phases bounded by an isotropic liquid (glycerine) was used for the present study. The surface tension-temperature characteristics, unlike the monotonically decreasing dependence found in most isotropic liquids, showed regions with a positive slope for both the smectic A and the nematic phases. A sharp increase in slope of the surface tension-temperature characteristic was observed near the smectic A-nematic and nematic-isotropic transition temperatures, indicating that excess surface order is developing near these transitions. The observed results are in compliance with the available theoretical predictions.

Original languageEnglish
Article number005
Pages (from-to)7691-7698
Number of pages8
JournalJournal of Physics: Condensed Matter
Volume4
Issue number38
DOIs
Publication statusPublished - 1992

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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