| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dispersion liquid of metallic microparticles having large particle diameters and sharp distribution characteristics of particle sizes, and a preparation method therefor, and to provide a transparent colored film and a manufacturing method therefor. <P>SOLUTION: The dispersion liquid includes colloidal metallic microparticles having nuclei of colloidal ultrafine metal-particles with particle diameters of 10 nm or less, and a metal precipitated on the surface of the nuclei by a reducing method. The metal is a noble metal such as Au, or an alloy containing the noble metal. A dispersing agent is an alkylamine, a carboxylic acid amide or an amino carboxylate. The colloidal metallic microparticles have an average particle diameter of 5 to 40 nm and the particle size distribution of σ = 2 or less in terms of standard deviation, in a particle size distribution with reference to number. The method for obtaining a transparent colored film comprises applying the dispersion liquid of the metallic microparticles onto a substrate, drying, layering, and burning it. <P>COPYRIGHT: (C)2004,JPO |
