Alignment of nematic butoxybenzilidene octylaniline by surface-relief gratings
- 1 November 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 24 (5) , 2713-2719
- https://doi.org/10.1103/physreva.24.2713
Abstract
The effect of surface-relief gratings on alignment of the nematic phase of butoxybenzilidene octylaniline has been studied for gratings of 1-μm and 300-nm period with grating depth from 22 to 410 nm. A planar-to-homeotropic alignment change was observed on flat surfaces and interpreted quantitatively by a model invoking the entropy change due to smectic short-range order imposed by the surface in the homeotropic state. The alignment change was suppressed by gratings of sufficient depth or short enough period.Keywords
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