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About: Photomechanical effect     Goto   Sponge   NotDistinct   Permalink

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Photomechanical effect is the change in the shape of a material when it is exposed to light. This effect was first documented by Alexander Graham Bell in 1880. More recently, Kenji Uchino demonstrated that a photostrictive material could be used for legs in the construction of a miniature optically-powered "walker". The most common mechanism of photomechanical effect is light-induced heating. Photomechanical materials may be considered smart materials due to their natural change implemented by external factors.