| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing a dispersion solution of a metal nanoparticle, which enables to control the shape or particle size of the metal nanoparticle within a wide range, a dispersion solution of a metal nanoparticle, which has excellent dispersion stability, and a method for producing the dispersion solution. <P>SOLUTION: In the production method comprising a process where a metal salt in which the ratio of silver in metallic elements is≥75 mass%, carboxylic acids and a reducing agent are mixed in a liquid phase, so as to synthesize a metal nanoparticle, and a process where the synthesized metal nanoparticle is dispersed into a dispersion medium, the synthesis of the metal nanoparticle is performed by stirring a suspension produced by admixing an additive comprising one or more organic compounds selected from the group consisting of PVP (polyvinylpyrrolidone), a PVP copolymer, cellulose ether, PVA (polyvinyl alcohol) and polyacrylic acid in the liquid phase together with the metal salt, carboxylic acids and reducing agent at 25 to 95°C, and, after the synthesis of the metal nanoparticle, the concentration of the additive comprised in the dispersion solution to be prepared is reduced, so as to be the range of 0.5 to 5,000 ppm. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
