Orientation of liquid crystals by surface coupling agents

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Abstract
Uniformly oriented thin liquid‐crystal layers are required for most liquid‐crystal device applications and physical investigations. Usual methods for obtaining orientation rely on a substrate interface which has an orienting action on the liquid‐crystal molecules. In previously described methods the orienting interfaces degrade chemically with time, thereby generating a corresponding degradation of the liquid‐crystal orientation. In the present work, silane surface coupling agents are used to obtain chemically stable interfaces and a wide variety of liquid‐crystal orientations.

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