Preparation of platinum nano-sized planar networks using low energy electron beams

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

Water solution containing 1 mmol/L PtCl ions and 0.5-20v% ethanol was irradiated with low energy electron beams. Production of planar networks was observed on the surface of the irradiated solution. Rutherford backscattering spectrometry and X-ray photoelectron spectroscopy demonstrated that the planar networks 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 ions at the surface of the solution. These Pt particles coagulated each other to form planar network.