Issue 12, 2012

Optically reconfigurable color change in chiral nematic liquid crystals based on indolylfulgide chiral dopants

Abstract

Stimuli-directed changes in the coloration of chiral nematic liquid crystal devices are in nearly all cases color-restoring upon removal of the input stimulus. This work employs photoresponsive indolylfulgide chiral dopants to generate optically reconfigurable but color-stable reflectivity when formulated with a nematic liquid crystal host to form a chiral nematic mesophase. The optically-directed color change of the chiral nematic material system to UV and blue irradiation is examined as a function of concentration and light intensity. The temporal stability of the reflection notch at arbitrary spectral positions is presented – confirming that long-lasting, optically reconfigurable color changes are obtainable in this material system. The optically reconfigurable color-stable changes in reflection color could be useful as optical filters, smart textiles, or active camouflage.

Graphical abstract: Optically reconfigurable color change in chiral nematic liquid crystals based on indolylfulgide chiral dopants

Supplementary files

Article information

Article type
Paper
Submitted
05 Jan 2012
Accepted
26 Jan 2012
First published
13 Feb 2012

J. Mater. Chem., 2012,22, 5751-5757

Optically reconfigurable color change in chiral nematic liquid crystals based on indolylfulgide chiral dopants

T. J. White, A. D. Zhao, S. A. Cazzell, T. J. Bunning, T. Kosa, L. Sukhomlinova, T. J. Smith and B. Taheri, J. Mater. Chem., 2012, 22, 5751 DOI: 10.1039/C2JM00098A

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