Effect of Interfaces on the Alignment of a Discotic Liquid-Crystalline Phthalocyanine

[en] 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.

Disciplines :

Chemistry
Physics

Author, co-author :

De Cupere, V.

Tant, J.

Viville, Pascal

Lazzaroni, Roberto ; Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux

Osikowicz, W.

Salaneck, W.R.

Geerts, Yves

Language :

English

Title :

Effect of Interfaces on the Alignment of a Discotic Liquid-Crystalline Phthalocyanine

Publication date :

29 August 2006

Journal title :

Langmuir

ISSN :

0743-7463

Publisher :

American Chemical Society, United States - District of Columbia

Volume :

Issue :

Pages :

7798-7806

Peer reviewed :

Peer Reviewed verified by ORBi

Research unit :

S817 - Chimie des matériaux nouveaux

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux

Commentary :

Publié en ligne le 23 mai 2006

Available on ORBi UMONS :

since 10 June 2010

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Scopus citations^®

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