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Report No.

Production of nano-sized platinum-particle films using low energy electron beams

Hakoda, Teruyuki; Yamamoto, Shunya; Shimoyama, Iwao; Yoshikawa, Masahito; Aritani, Hirofumi*

Water solution containing 1 mmol/L PtCl$$_{4}$$$$^{2-}$$ ions and 0.5-20v% ethanol was irradiated with low energy electron beams. Production of thin films were observed on the surface of the irradiated solution. Rutherford backscattering spectrometry and X-ray photoelectron spectroscopy demonstrated that the thin films consisted of metal platinum and their production was accelerated at lower ethanol concentrations. Transmission electron microscope observation suggested that Pt particles with sizes of 2-5 nm are produced through reduction of PtCl$$_{4}$$$$^{2-}$$ ions at the surface of the solution. These Pt particles coagulated each other to form the films.



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