[OPTICAL REVIEW Vol. 16, No. 2 (2009) 208-212]
© 2009 The Optical Society of Japan
Three-Dimensional Photochemical Microfabrication of Conductive Polymers in Transparent Polymer Sheet
Katsumi YAMADA, Junji SONE1, and Jun CHEN2
Department of Nanochemistry, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan
1Department of Applied Computer Science, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan
2Department of Media and Image Technology, Tokyo Polytechnic University, 1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan
(Received July 14, 2008; Accepted January 5, 2009)
By focused illumination at the wavelength of 800 nm using a femtosecond laser, the tris(2,2'-bipyridyl)ruthenium complex displayed a two-photon excitation as observed by the quadratic dependence of the emission intensity on the incident laser power. Since the oxidation of pyrrole is induced by the oxidative quenching of the excited state, polypyrrole can be formed by a continuous illumination. The polymerization area showed a high spatial selectivity which can be scanned in the XYZ axis by a piezo device. In the present study, three-dimensional (3D) polypyrrole microstructures were formed in the transparent polymer sheet.
Key words: photofabrication, conductive polymers, multi-photon absorption, femtosecond laser