| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a metal nanoparticle collide having high purity and high concentration which can be used in a dissolved state in a wide variety of solvents which are hydrophilic or hydrophobic, and to provide metal nanoparticles, a multi-element nanoparticle colloid, and an inexpensive production method of multi-element metal nanoparticles.SOLUTION: The concentration of metal nanoparticles in a colloid is increased by repeating processes of: rendering the colloid into a condition where the metal can move by vaporization 24 or the like in a reduced pressure atmosphere or in vacuum 21; and bonding the metal to a moving body 26 of a fluidized membrane type surfactant without dissolving the surfactant in a solvent to collect the metal nanoparticles.</p> |
