Abstract
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.
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