Importance

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Abstract

The problems can be solved by using a method for producing a metal nanoparticle colloid, which comprises the steps of S1: mixing, into a nonpolar hydrocarbon oil having a vapor pressure of 10⁻³ Torr or less at room temperature, organic molecules having both a hydrophilic group and a lipophilic group and having in the end of the hydrophilic group an N, S, P, or O atom or having at the hydrophilic group a functional group of an NH₂ group, an NH group, an SH group, a PO group, or an OH group to prepare a base liquid, and S2: placing the base liquid in a rotatable vacuum drum and charging a non-magnetic metal material in a crucible provided in the vacuum drum, and depositing the vapor of the non-magnetic metal material on the base liquid which adheres to the inner wall of the vacuum drum and rotates together with the rotating drum under conditions such that the inside of the vacuum drum is under a reduced pressure and the vacuum drum is rotated, and a task of the present invention is to provide a method for producing a metal nanoparticle colloid having non-magnetic metal nanoparticles having various shapes.

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First Claim