Abstract
CuO nanoparticles were directly reduced to form Cu micropattems using femtosecond laser writing. CuO nanoparticles were dispersed into reductant agent and base polymers. When femtosecond laser pulses were focused and irradiated into the CuO nanoparticle based films on glass substrate, Cu micropattems were formed by reducing and sintering of CuO nanoparticles. X-ray diffraction spectra of the laser irradiated area shows Cu peaks although the Cup peaks were not observed in that of non-laser irradiated area. The width of the Cu micropattems was increased with decreasing laser pulse energy and scanning speed. Cu-rich patterns were obtained by laser irradiation with high laser scanning speed. The resistance of the line patterns were inversely proportional to the line width which indicated that the Cu micropattems have uniform electrical properties.
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