超臨界流体を用いた貴金属超微粒子の合成

概要

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Colloidal dispersions of noble metal nano-particles have been synthesized by the reduction of metallic ions in sub- and supercritical fluids of water, ethanol, 1-propanol, toluene and their mixtures. By using flow type reactor withstanding high-pressure and high-temperature, the reduction of metallic ions has been accomplished within a few seconds under the presence of protective polymer. Several kinds of metallic ions such as gold, platinum, rhodium, palladium, ruthenium, and their mixtures have been used to synthesize mono-metallic or bimetallic nano-particles successfully. The particle size and structure of particles have been controlled by the solvent species and temperature of the reaction.
2010-02-20