Metallic fine particles, process for producing the same, composition containing the same, and use thereof
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United States of America Patent
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Dec 7, 2010
Grant Date -
Nov 19, 2009
app pub date -
Dec 8, 2005
filing date -
Dec 10, 2004
priority date (Note) -
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Abstract
A process for producing metallic fine particles is provided by, the reduction of the metallic ions performed in two steps using two types of reducing agents which significantly differ in reducing ability thereof, in which a reducing agent in which the reduction ability is strong is used in the first reduction step, and a reducing agent in which the reduction ability is weak is used in the second reduction step, and the nano-sized metallic fine particles are produced. An aqueous metallic salt solution containing a surfactant is used and a two-step reduction is performed in the same vessel, in which as the reducing agent of the first reduction process, at least one selected from the group consisting of boron hydride, dimethylamine borane, hydrazine, and ascorbic acid is used, and as the reducing agent of the second reduction process, specific alkylamine or alkanolamine is used.
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