PHOTORESPONSIVE SOLUTION, METHOD FOR PREPARING THE SAME AND METHOD FOR MANUFACTURING METAL NANO PARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a photoresponsive solution having the property that nano particles are dispersed when irradiated with light and are precipitated when the light is intercepted, and a method for preparing the same.SOLUTION: The photoresponsive solution includes metal nano particles reduced by hydrogen radicals and having an average particle size of 2 nm or more and 100 nm or less and a solvent. The metal nano particles are dispersed in the solvent when irradiated with light and are precipitated in the solvent when the light is intercepted. The metal nano particles are preferably spherical. The photoresponsive solution is obtained by reducing a metal salt using a generated hydrogen radical as a reduced species to synthesize metal nano particles having an average particle size of 2 nm or more and 100 nm or less in the solution.