| abstract |
A fine particle in which a surface of a copper oxide fine particle (a) is coated with a coating layer (b) containing a monovalent copper compound, in which the fine particle has a specific surface area of 100 m2/g or greater, an average primary particle diameter in a range of 5 to 20 nm, and an average secondary particle diameter in a range of 5 to 50 nm, is provided. |