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      Synthesis, characterization, and photo-responsive properties of Y-shaped amphiphilic azo triblock copolymer : ARTICLE

      1 , 2 , 3 , 1 , 2
      Journal of Applied Polymer Science
      Wiley

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          Photomechanics: directed bending of a polymer film by light.

          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.
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            Photoinduced motions in azo-containing polymers.

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              A new opto-mechanical effect in solids.

              We propose that large, reversible shape changes in solids, of between 10%-400%, can be induced optically by photoisomerizing monodomain nematic elastomers. Empirical and molecular analysis of shape change and its relation to thermal effects is given along with a simple model of the dynamics of response. Our experiments demonstrate these effects for the first time and theory is compared qualitatively with our results.
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                Author and article information

                Journal
                Journal of Applied Polymer Science
                J. Appl. Polym. Sci.
                Wiley
                00218995
                August 05 2016
                August 05 2016
                April 21 2016
                : 133
                : 29
                Affiliations
                [1 ]Research Branch of Advanced Functional Materials, School of Microelectronics and Solid-State Electronics, High Temperature Resistant Polymer and Composites, Key Laboratory of Sichuan Province; University of Electronic Science and Technology of China; Chengdu 610054 China
                [2 ]Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE); Tsinghua University; Beijing 100084 China
                [3 ]Sichuan Institute of Piezoelectric and Acoustooptic Technology; Chongqing 400060 China
                Article
                10.1002/app.43695
                7f04f167-908a-4401-97fb-9d1008bea6b8
                © 2016

                http://doi.wiley.com/10.1002/tdm_license_1.1

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                Self URI (article page): http://doi.wiley.com/10.1002/app.43695

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