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Local deposition of polypyrrole on aluminum by anodizing, laser irradiation, and electrolytic polymerization and its application to the fabrication of micro-actuators

2006; Elsevier BV; Volume: 51; Issue: 23 Linguagem: Inglês

10.1016/j.electacta.2005.12.049

1873-3859

Y. Akiyama, Tatsuya Kikuchi, Mikito Ueda, Mieko Iida, Masatoshi Sakairi, Hiroki Takahashi,

Dielectric materials and actuators

Polypyrrole was deposited at selected areas on aluminum by anodizing, laser irradiation, and electrolytic polymerization, and the application of the technique for fabricating micro-actuators was attempted.Aluminum specimens covered with porous type anodic oxide films were irradiated with a pulsed Nd-YAG laser to remove the oxide films locally, and then thin Ni layers were deposited at areas where film had been removed.Polypyrrole could be successfully deposited only on the Ni layer by anodic polarization of the specimens in pyrrole monomer solution, and a polypyrrole / Ni bilayer-structure could be obtained by dissolution of the aluminum substrate and anodic oxide film in NaOH solutions.The bilayer structure was found to be inactive to doping and dedoping of ions during anodic and cathodic polarization.A three layer structure, nitrocellulose / Ni / polypyrrole, fabricated by electrolytic polymerization after nitrocellulose coating on a Ni layer detached from the aluminum substrate, showed ion-doping and -dedoping activity, suggesting the possibility of fabricating micro-actuators in this manner.