Photoinduced bending upon pulsed irradiation in azobenzene-containing crosslinked liquid-crystalline polymers
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||9|
|Journal||Journal of Nonlinear Optical Physics and Materials|
|Publication status||Published - Sep 2011|
|Publication type||A1 Journal article-refereed|
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.