Liquid Crystal Alignment on Langmuir-Blodgett Films

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Abstract
Some initial studies of the liquid crystal aligning properties of LB films of u-tricosenoic acid, cadmium arachidate and merocyanine dyes have been carried out. These particular materials have been found to induce homeotropic, or tilted homeotropic, alignment in liquid crystal layers. The tilt angle has been measured for alignment on u-tricosenoic acid and an example of an electrically switched liquid crystal cell using these aligning layers has been demonstrated. Differences have been noted in the uniformity of aligning properties of multilayers of these materials dependent on the packing density of the molecules within the films. In addition it has been found possible to change the alignment of the liquid crystal on u-tricosenoic acid that has been subject to e-beam irradiation.