Photo-Induced Anisotropy of Methyl Red Azo Dye in Polymer Film
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Published:2022-12-22
Issue:4
Volume:22
Page:63-72
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ISSN:1991-3966
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Container-title:Liquid Crystals and their Application
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language:
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Short-container-title:Liq. Cryst. and their Appl.
Author:
Kozenkov Vladimir M.,
Belyaev Viktor V.ORCID,
Chausov Denis N.ORCID
Abstract
A photo-induced anisotropy (PIA) of Methyl Red (MR) azo dye embedded in PMMA polymer solid films was investigated by studying dichroic spectra and photo-induced birefringence. The reversible PIA of MR dye was measured in situ during photoactive irradiation process. Photoinduced order increases with the rise of exposure power. It is shown that PIA dark relaxation slows down at higher exposure energy. The MR rotational diffusion was evaluated at different exposure modes. These data are useful for the characterization of Methyl Red azo dye as a liquid crystal photo-aligning material.
Publisher
Ivanovo State University
Subject
Materials Chemistry,Surfaces, Coatings and Films,Materials Science (miscellaneous),Biomaterials,Electronic, Optical and Magnetic Materials