A plane thin-type polymer actuator is provided with a conductive active member serving as a first electrode layer, and a second electrode layer, with at least a first electrolytic layer made in contact with the active member layer. The first electrolytic layer being sealed between the two electrode layers...http://www.google.com/patents/US7679268?utm_source=gb-gplus-sharePatent US7679268 - Polymer actuator having active member layer that expands or contracts upon application of electric field
