Photo-Orientation at the Interface between Thermotropic Nematic Liquid Crystal and Water Caused by Azobenzene Polymer Additivesстатья
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Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
Аннотация:Photoinduced orientational transitions in a thermotropic nematic liquid crystal caused by modulation of the boundary conditions at the water surface were observed and investigated. The initially degenerated planar anchoring of liquid crystal at the water surface becomes homeotropic under near-UV irradiationwhich induces photoizomerization of comb-shaped azobenzene polymer additives adsorbed from the liquidcrystal to its interface with water. After irradiation, the photoinduced orientational structures spontaneously relax to the initial ones. It was shown that the orientational sensitivity to light irradiation strongly depends onthe polymerization degree of azobenzene additives.