Yu Yanlei, Nakano Makoto, Ikeda Tomiki
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
Nature. 2003 Sep 11;425(6954):145. doi: 10.1038/425145a.
Polymer solutions and solids that contain light-sensitive molecules can undergo photo-contraction, whereby light energy is converted into mechanical energy. Here we show that a single film of a liquid-crystal network containing an azobenzene chromophore can be repeatedly and precisely bent along any chosen direction by using linearly polarized light. This striking photomechanical effect results from a photoselective volume contraction and may be useful in the development of high-speed actuators for microscale or nanoscale applications, for example in microrobots in medicine or optical microtweezers.
含有光敏分子的聚合物溶液和固体可以发生光收缩，即光能被转化为机械能。在此我们展示了，通过使用线偏振光，含有偶氮苯发色团的液晶网络的单层薄膜能够沿着任何选定的方向反复且精确地弯曲。这种显著的光机械效应源于光选择性体积收缩，可能对开发用于微尺度或纳米尺度应用的高速致动器有用，例如在医学中的微型机器人或光学镊子。
