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Morphology of open films of discotic hexagonal columnar liquid crystals as probed by grazing incidence X-ray diffraction.
Grelet, Eric; Dardel, Sébastien; Bock, Harald; Goldmann, Michel; Lacaze, Emmanuelle; Nallet, Frédéric.
Afiliação
  • Grelet E; Centre de Recherche Paul-Pascal, CNRS -Université de Bordeaux, 115 Avenue Schweitzer, 33600, Pessac, France. grelet@crpp-bordeaux.cnrs.fr
Eur Phys J E Soft Matter ; 31(4): 343-9, 2010 Apr.
Article em En | MEDLINE | ID: mdl-20411293
ABSTRACT
The structure and the orientation of thermotropic hexagonal columnar liquid crystals are studied by grazing incidence X-ray diffraction (GIXD) for different discotic compounds in the geometry of open supported thin films. Whatever the film deposition mode (either spin-coating or vacuum evaporation) and the film thickness, a degenerate planar alignment with the liquid crystalline columns parallel to the substrate is found. However, if a specific thermal process is applied to the liquid crystal film, homeotropic anchoring (columns normal to the interface) can be stabilized in a metastable state.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies / Risk_factors_studies Idioma: En Revista: Eur Phys J E Soft Matter Assunto da revista: BIOFISICA Ano de publicação: 2010 Tipo de documento: Article País de afiliação: França

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Incidence_studies / Risk_factors_studies Idioma: En Revista: Eur Phys J E Soft Matter Assunto da revista: BIOFISICA Ano de publicação: 2010 Tipo de documento: Article País de afiliação: França