Blue-shifting tuning of the selective reflection of polymer stabilized cholesteric liquid crystals. Issue 35 (17th August 2017)

• Record Type: Journal Article
• Authors: Min Lee, Kyung; Tondiglia, Vincent P.; Godman, Nicholas P.; Middleton, Claire M.; White, Timothy J.
• Is Part Of: Soft matter. Volume 13:Issue 35(2017)
• Page Start: 5842
• Page End: 5848
• Publication Date: 2017-08-17
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c7sm01190c
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : We report on electrically-induced, large magnitude (>300 nm), and reversible tuning of the selective reflection in polymer stabilized cholesteric liquid crystals (PSCLCs) prepared from negative dielectric anisotropy nematic liquid crystal hosts. Abstract : We report on electrically-induced, large magnitude (>300 nm), and reversible tuning of the selective reflection in polymer stabilized cholesteric liquid crystals (PSCLCs) prepared from negative dielectric anisotropy nematic liquid crystal hosts. The electrically-induced blue shift in the selective reflection of the PSCLCs is distinguished from our prior reports of bandwidth broadening and red-shifting tuning of the selective reflection in PSCLCs. The dominant factor in delineating the electro-optic response of the PSCLCs detailed here are the preparation conditions. Specifically, long exposure to UV intensity exceeding 250 mW cm −2 . Other factors are shown to contribute to the response, including the type and concentration of photoinitiator.