▎ 摘　　要

NOVELTY - A multilayered graphene-coated metal nanoparticles comprise multilayered graphene directly grown on the surface of the single metal catalyst particles. The metal catalyst particles have metal catalyst particles. The multilayered graphene absorbs light energy during optical ignition, generates heat by vibrating surrounding air molecules and generated heat is transferred to the single metal catalyst particles. USE - Multilayered graphene-coated metal nanoparticles are used as optical igniter for highly energetic nanomaterial (claimed). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) highly energetic nanomaterial, which comprises the multilayered graphene-coated metal nanoparticles; and (2) preparation of multilayered graphene-coated metal nanoparticles, which involves preparing metal nitrate aqueous solution by dissolving metal nitrate in distilled water, forming droplets using the metal nitrate aqueous solution, injecting the resultant droplets into a reactor, synthesizing metal nanoparticles through a thermal decomposition reaction and a hydrogen reduction reaction of a metal nitrate aerosol solidified through a silica gel, directly growing the graphene layer on the surface of single metal nanoparticles having different average diameters and collecting metal nanoparticles coated with multilayer graphene through a membrane filter.