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

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 t...

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Detalles Bibliográficos
Autores principales: Shvetsov, Sergey A, Emelyanenko, Alexander V, Boiko, Natalia I, Zolot'ko, Alexander S, Zhang, Yan-Song, Liu, Jui-Hsiang, Khokhlov, Alexei R
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5870153/
https://www.ncbi.nlm.nih.gov/pubmed/29600148
http://dx.doi.org/10.3762/bjnano.9.81
Descripción
Sumario: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.