Photostriction in ferroelectrics arises from a superimposed phenomenon of the photovoltaic and inverse piezoelectric effects. This paper reviews the recent developments in materials and their device applications: ion doping effect is described in (Pb, La)(Zr, Ti)O3 based ceramics firstly to improve the response speed, then the drive/control methods (polarized light method and dual beam method) are presented, finally photo-driven relays, micro walking machines and photoacoustic devices are introduced. The devices based on a bimorph structure were designed to start moving by the irradiation without any external electric circuit.
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Chu et al. (1995) studied this question.
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