Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant

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Abstract

Two sequential transformations of the orientational structure in nematic liquid crystal droplets containing a dendrimer additive (nanosized macromolecules with light-absorbing azobenzene terminal moieties) under light irradiation in the UV-blue spectral range were investigated. The origin of these transitions is in the change of the boundary conditions due to photoisomerization of the dendrimer adsorbed onto the liquid crystal-glycerol interface. It was shown that the photoisomerization processes of dendrimer molecules in a liquid crystal are accompanied by a spatial rearrangement of their azobenzene moieties, which is the key point in the explanation of the observed effects.

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Shvetsov, S. A., Emelyanenko, A. V., Boiko, N. I., Zolot’ko, A. S., Zhang, Y. S., Liu, J. H., & Khokhlov, A. R. (2018). Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant. Beilstein Journal of Nanotechnology, 9(1), 870–879. https://doi.org/10.3762/bjnano.9.81

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