Volume 34, Issue 10 pp. 1747-1749
Article

Adsorption-induced bending of polypyrrole films and its application to a chemomechanical rotor

Hidenori Okuzaki

Hidenori Okuzaki

Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda, Kofu 400, Japan

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Toshio Kunugi

Corresponding Author

Toshio Kunugi

Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda, Kofu 400, Japan

Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Yamanashi University, 4-3-11 Takeda, Kofu 400, JapanSearch for more papers by this author

Abstract

We have discovered that polypyrrole films undergo rapid and intensive bending in the solid state. Bending was induced by the reversible and anisotropic adsorption of various substances in the vapor state. The speed and direction of bending largely depended on the adsorbate used. By using this phenomenon, we have devised an experimental “chemomechanical rotor” capable of transducing a chemical free energy change directly into a continuous rotation. © 1996 John Wiley & Sons, Inc.

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