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Moniruzzaman, M.
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article
Investigation of reversible photo-mechanical properties of azobenzene-based polymer films by nano-indentation
Abstract
Photo-induced mechanical properties of two copolymer thin films with 3.5 and 6 mol% azobenzene chromophores in the side chain, were investigated by nanoindentation. After ultraviolet irradiation the stiffness of the films was found to increase by about 10-28% compared to their original 'virgin' state. The altered mechanical properties were attributed to conformational changes in the polymer chains via a trans-cis isomerisation of the chromophores. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.