A solid-state microactuator was studied using volume change due to redox reaction of poly(pyrrole) film. Pyrrole was electropolymerized on a comb-shaped microelectrode array, and the poly(pyrrole) film was covered by a solid polymer electrolyte, polyethylene glycol. The volume change of the poly(pyrrole) film by electrochemical polarization was measured using a laser displacement sensor, and the mechanism of the volume change was discussed.
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Yamada et al. (1998) studied this question.
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