| 摘要 |
Noble-metal nanoparticles which are metal nanoparticles comprising a noble metal component and further comprise at least one of an organic component containing N and an organic component containing S and have an average diameter controlled to 20 nm or less. A method for producing noble-metal nanoparticles having an average particle diameter of 20 nm or less, which comprises subjecting a noble metal complex compound of quaternary ammonium salt type, represented by the general formula: [R1R2R3R4N]x[My(A) z][wherein R1 to R4 represent the same or different hydrocarbon groups and may have a substituent, M represents at least one noble metal, A represents a thiolate ligand, x represents an integer greater than 0, y represents an integer greater than 0, and z represents an integer greater than 0] to a heat treatment in the presence of an aliphatic amine. The above noble-metal nanoparticles and the above method allow the production of noble-metal nanoparticles excellent in the dispersion stability on a commercial scale.
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