Journal
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume 422, Issue -, Pages 11-19Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421400490501950
Keywords
liquid crystals doped with azo-dyes; optical reorientation; polymer networks; surface memory effect
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We report on the stability of the optical reorientation of doped nematic liquid crystals(LCs)with azo-dyes in polymer networks. The photo-reactive polymer networks formed within the doped LC medium play a critical role in achieving the stable optical reorientation of the LC originating from the trans-cis transformation of the dye molecules. Moreover, the photo-reactive polymer layer on the substrate surface is required to produce the surface memory effect of the dye-doped LC. The optically induced memory is well retained in the dye-doped LC only in the presence of the polymer network medium.
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