Patent ID: 8088487

Claim:
A metal nanoparticle, modified by a cyclic phenylazomethine compound having a structure represented by Chemical Formula 1: wherein the cyclic phenylazomethine compound is at least one compound selected from the group consisting of formulae (1), (2) and (3) including imine and a benzene ring; where R 1 and R 2 that may be identical or different are a hydrogen atom or a substituted or unsubstituted aryl or alkyl group; n is an integer of 2 or greater indicative of a degree of polymerization; m is an integer of 3 or greater indicative of a degree of polymerization; and R is a spacer that directly connects imines together in formulae (1) and (2), makes a direct connection between the imine and the benzene ring in formula (3), or includes a carbon atom and a hydrogen atom.