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2006-08-29 - Article/Dans un journal avec peer-review - Anglais - 9 page(s)

De Cupere V., Tant J., Viville Pascal , Lazzaroni Roberto , Osikowicz W., Salaneck W.R., Geerts Yves, "Effect of Interfaces on the Alignment of a Discotic Liquid-Crystalline Phthalocyanine" in Langmuir, 22, 18, 7798-7806

  • Edition : American Chemical Society, Washington (DC)
  • Codes CREF : Chimie quantique (DI1321), Optique (DI1250)
  • Unités de recherche UMONS : Chimie des matériaux nouveaux (S817)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) This paper deals with the influence of the nature and number of solid interfaces on the alignment of the columns in a semiconducting discotic liquid crystal. The solid substrates have been characterized in terms of their roughness and surface energy. The alignment of the discotic liquid crystal columns on these substrates has been determined by optical microscopy under crossed polarizers and by tapping-mode atomic force microscopy. The nature of the substrates has negligible influence on the alignment. The key parameter is the confinement imposed to the film. These surprising observations are explained by the antagonist alignment role of gas and solid interfaces.

Notes :
  • (Anglais) Publié en ligne le 23 mai 2006
Identifiants :
  • DOI : 10.1021/la0605182