Effect of interfaces on the alignment of a discotic liquid-crystalline phthalocyanine
Effect of interfaces on the alignment of a discotic liquid-crystalline phthalocyanine
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DOI：
10.1021/la0605182
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发表时间：
2006-08-29
期刊：
影响因子：
3.9
通讯作者：
Geerts, Yves Henri
中科院分区：
文献类型：
--
作者：
De Cupere, Vinciane;Tant, Julien;Geerts, Yves Henri
本文讨论了半导体离散液晶中固体界面的性质和数目对液晶柱排列的影响。固体基质的特征在于它们的粗糙度和表面能。在这些基板上的discovery液晶柱的取向已确定通过光学显微镜下的交叉偏振器和双折射模式的原子力显微镜。衬底的性质对对准的影响可以忽略不计。关键参数是施加到膜上的限制。这些令人惊讶的观察结果可以用气体和固体界面的对抗排列作用来解释。
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.