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Wetting and interfacial order at nematic free surfaces


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Author: Martín del Río, Elvira Fátima
Telo Da Gama, Margarida Maria
Miguel Agustino, Enrique de
Rull Fernández, Luis Felipe
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 1996-07-20
Published in: Europhysics Letters, 35 (3), 189-194.
Document type: Article
Abstract: We apply a density-functional theory to the free surface of a model liquid crystal, to investigate the orientational order at the nematic free surface of systems exhibiting orientational wetting at the isotropic liquid-vapour interface. It is shown that the theory accounts for the growth of the surface ordered layer which develops at the nematic-vapour interface, as the temperature increases up to the triple point, as was recently reported for 4-cyano-4′-n-alkyl-biphenyls. We have found a correlation between the growth of this layer and the non-monotonic temperature dependence of the interfacial tension below the triple point. The theoretical results are in excellent agreement with the results for 8CB.
Cite: Martín del Río, E.F., Telo da Gama, a., Miguel Agustino, E.d. y Rull Fernández, L.F. (1996). Wetting and interfacial order at nematic free surfaces. Europhysics Letters, 35 (3), 189-194.
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DOI: 10.1209/epl/i1996-00552-9

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