Abstract
Polymer/metal cluster nanocomposite thin films as newtypes of electroactive polymer (EAP) material have beensynthesized by the layer-by-layer (LBL) electrostatic self-assembly process. A self-assembled 11-bilayer poly-S-119/Ptnanocluster film, with a thickness of approximately 30 nm and aPt content of 0.49 at.%, exhibited an actuationresponse similar to that of conventional ionic polymer-metalcomposite films for low applied voltage in air, butnonlinear bending behaviour in response to a slightly higherapplied voltage. The film has a uniform nanostructure with thePt nanoclusters dispersed within the multiple molecular layers,as confirmed by atomic force microscopy. The self-assembledelectroactive films may have different actuationmechanisms from those of traditional piezoelectric materials,and from other EAP materials, due to the quite differentLBL laminated structure. Further studies concerningthe principles governing the novel processing of the films andapplications are underway.
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