Hexatic and crystal phase transitions in thin free-standing liquid-crystal films

R. Geer, T. Stoebe, C. C. Huang, R. Pindak, G. Srajer, J. W. Goodby, M. Cheng, J. T. Ho, S. W. Hui

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Thermal and structural studies have been performed on thin films of n-heptyl-4'-n-pentyloxylbiphenyl-4-carboxylate (75OBC). Similar to 65OBC, a surface hexatic phase is observed for films greater than four molecular layers in thickness. Four- and three-layer films display a single, two-dimensional liquid-hexatic transition. The four-layer heat-capacity anomaly is described well by a divergent power-law expression. The three-layer heat-capacity anomaly is qualitatively the same, although its size is greatly reduced. Also, a surface crystal-E phase is observed immediately below the liquid-hexatic transition(s).

Original languageEnglish (US)
Pages (from-to)1322-1325
Number of pages4
JournalPhysical Review Letters
Volume66
Issue number10
DOIs
StatePublished - Jan 1 1991

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liquid crystals
crystals
specific heat
anomalies
liquids
crystal surfaces
carboxylates
thin films

Cite this

Geer, R., Stoebe, T., Huang, C. C., Pindak, R., Srajer, G., Goodby, J. W., ... Hui, S. W. (1991). Hexatic and crystal phase transitions in thin free-standing liquid-crystal films. Physical Review Letters, 66(10), 1322-1325. https://doi.org/10.1103/PhysRevLett.66.1322

Hexatic and crystal phase transitions in thin free-standing liquid-crystal films. / Geer, R.; Stoebe, T.; Huang, C. C.; Pindak, R.; Srajer, G.; Goodby, J. W.; Cheng, M.; Ho, J. T.; Hui, S. W.

In: Physical Review Letters, Vol. 66, No. 10, 01.01.1991, p. 1322-1325.

Research output: Contribution to journalArticle

Geer, R, Stoebe, T, Huang, CC, Pindak, R, Srajer, G, Goodby, JW, Cheng, M, Ho, JT & Hui, SW 1991, 'Hexatic and crystal phase transitions in thin free-standing liquid-crystal films', Physical Review Letters, vol. 66, no. 10, pp. 1322-1325. https://doi.org/10.1103/PhysRevLett.66.1322
Geer, R. ; Stoebe, T. ; Huang, C. C. ; Pindak, R. ; Srajer, G. ; Goodby, J. W. ; Cheng, M. ; Ho, J. T. ; Hui, S. W. / Hexatic and crystal phase transitions in thin free-standing liquid-crystal films. In: Physical Review Letters. 1991 ; Vol. 66, No. 10. pp. 1322-1325.
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