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Photoinduced bending upon pulsed irradiation in azobenzene-containing crosslinked liquid-crystalline polymers

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)405-413
Number of pages9
JournalJournal of Nonlinear Optical Physics and Materials
Volume20
Issue number4
DOIs
Publication statusPublished - Sep 2011
Publication typeA1 Journal article-refereed

Abstract

We have investigated the photoresponsive behavior of homogeneously aligned low-azobenzene-concentration crosslinked liquid-crystalline polymers. We compared the thermal contraction and photocontraction of the films, and show that upon UV irradiation, they bend efficiently towards the actinic light source. The photoinduced bending is studied both under continuous-wave irradiation and irradiation with nanosecond pulses. Pulsed irradiation revealed that the photomechanical response can take place within sub-millisecond time scale, and that even a single laser pulse can cause the sample to bend.

Keywords

  • Azobenzene, Liquid crystal, Photocontraction, Photomobile materials, Pulsed irradiation