Anisotropic surface order in the isotropic phase of nematic liquid crystals

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Abstract

A spinning-drop technique was used to study the thermal variation of surface tension of two nematic liquid crystals at the interface with an isotropic fluid. A sharp increase in interfacial tension was observed in the vicinity of the nematic-isotropic transition. The interfacial tension-temperature characteristics, unlike monotonically decreasing dependence found in most isotropic fluids, showed regions of positive slope, both in the isotropic and anisotropic phases. A positive slope in the isotropic region of the liquid crystal is interesting since it implies that excess order has developed at the surface while the bulk interior remains isotropic.

Original languageEnglish
Pages (from-to)519-523
Number of pages5
JournalCrystal Research and Technology
Volume32
Issue number4
Publication statusPublished - 1997

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ASJC Scopus subject areas

  • Condensed Matter Physics

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