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Effect of interfaces on the alignment of a discotic liquid-crystalline phthalocyanine
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2006 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 22, no 18, 7798-7806 p.Article in journal (Refereed) Published
Abstract [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. © 2006 American Chemical Society.

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2006. Vol. 22, no 18, 7798-7806 p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-36040DOI: 10.1021/la0605182Local ID: 29550OAI: oai:DiVA.org:liu-36040DiVA: diva2:256888
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13

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Osikowicz, WojciechSalaneck, William R

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