16 October 2013 Nanoscopic actuators in light-induced deformation of glassy azo-polymers
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Abstract
We present the theoretical and computer simulation studies of photo-mechanics in glassy azo-oligomers. Angular distributions of chromophores in respect to the backbones obtained at different temperatures served as input into a theoretical expression for the striction stress, which was found to be positive for the structure under investigation. The light-induced reorientation of typical propeller-like structures is shown to be a microscopic reason of the sample elongation. The azo-propellers work as nanoscopic actuators which convert the light energy into material deformation. This finding opens a way for prediction of photomechanical properties of glassy azo-compounds directly from their chemical structure.
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M. Saphiannikova, V. Toshchevikov, J. Ilnytskyi, "Nanoscopic actuators in light-induced deformation of glassy azo-polymers", Proc. SPIE 8901, Optics and Photonics for Counterterrorism, Crime Fighting and Defence IX; and Optical Materials and Biomaterials in Security and Defence Systems Technology X, 89010X (16 October 2013); doi: 10.1117/12.2031775; https://doi.org/10.1117/12.2031775
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