Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/3598
Título: Microscopic Theory of Anchoring Transitions at the Surfaces of Pure Liquid-Crystals and their Mixtures .1. The Fowler Approximation
Autor: Teixeira, Paulo Ivo Cortez
Sluckin, T. J.
Palavras-chave: Density-Functional Theory
Elastic-Constants
Vapor Interface
Curvature Elasticity
Molecular Theory
Isotropic Phase
Nematic Liquids
Smectic-A
Fluids
Order
Data: 15-Jun-1992
Editora: Amer Inst Physics
Citação: TEIXEIRA, P. I. C.; SLUCKIN, T. J. – Microscopic Theory of Anchoring Transitions at the Surfaces of Pure Liquid-Crystals and their Mixtures .1. The Fowler Approximation. Journal of Chemical Physics. ISSN 0021-9606. Vol. 97, nr. 2 (1992), p. 1498-1509.
Resumo: We have generalized earlier work on anchoring of nematic liquid crystals by Sullivan, and Sluckin and Poniewierski, in order to study transitions which may occur in binary mixtures of nematic liquid crystals as a function of composition. Microscopic expressions have been obtained for the anchoring energy of (i) a liquid crystal in contact with a solid aligning surface; (ii) a liquid crystal in contact with an immiscible isotropic medium; (iii) a liquid crystal mixture in contact with a solid aligning surface. For (iii), possible phase diagrams of anchoring angle versus dopant concentration have been calculated using a simple liquid crystal model. These exhibit some interesting features including re-entrant conical anchoring, for what are believed to be realistic values of the molecular parameters. A way of relaxing the most drastic approximation implicit in the above approach is also briefly discussed.
Peer review: yes
URI: http://hdl.handle.net/10400.21/3598
ISSN: 0021-9606
Versão do Editor: http://scitation.aip.org/content/aip/journal/jcp/97/2/10.1063/1.463226
Aparece nas colecções:ISEL - Física - Artigos

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