METHOD FOR PRODUCING GOLD COLLOID, AND GOLD COLLOID

摘要

PPROBLEM TO BE SOLVED: To provide a method for producing gold colloid with particle diameters in accordance with a purpose having a sharp particle diameter distribution, and whose shape is uniform and spherical. PSOLUTION: The method for producing gold colloid comprises: a nucleation step where a first reducing agent is added to a first gold salt solution, so as to form nuclear colloidal particles; and a growing step where a second gold salt and a second reducing agent are added to the solution of the nuclear colloidal particles, so as to grow the nuclear colloid. The growing step is performed for at least one or more times, a citrate is used as the first reducing agent, an ascorbate is used as the second reducing agent, and also, the addition of the ascorbate in the growing step is performed simultaneously with the addition of the second gold salt. According to the method for producing gold colloid, the gold colloid having a sharp particle diameter distribution, and whose shape is uniform and spherical can be obtained. PCOPYRIGHT: (C)2008,JPO&INPIT