The photomechanical effect is the change in the shape of a material when it is exposed to light. The photomechanical effect was first documented by Alexander Graham Bell in 1880. More recently, Uchino demonstrated that a photostrictive material could be used as legs in the construction of a miniature optically-powered "walker."
The most common mechanism of the photomechanical effect is light-induced heating.
- A. G. Bell, Proceedings of the American Association for the Advancement of Science 29, 115 (1881).
- K. Uchino and E. L. Cross, Japanese Journal of Applied Physics 19, L171 (1980).
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