▎ 摘　　要

NOVELTY - Synthesizing metal nanoparticle, comprises (a) mixing graphene oxide sheet combined with anionic functional group on the surface and metal precursor material with an aqueous solution, (b) forming complex compound by electrostatic attraction between the anionic functional group and the metal ions disassociated from the aqueous solution, and (c) producing metal nanoparticle deposited on the surface of graphene by reducing the obtained complex compound. USE - The method is useful for synthesizing metal nanoparticle (claimed). ADVANTAGE - The method solved the problem of encapsulation and sintering during heat treatment using strong binding energy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for metal nanoparticle prepared by the above method.