抄録
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.
