▎ 摘　　要

Copper(II) l-methionine complex/silver nanoparticles/graphene-coupled nanoaggregates (Cu(Met)(2)/Ag/Graphene) were prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and Raman scattering spectroscopy. Analysis of surface-enhanced Raman scattering of as-prepared nanoaggregate revealed that Cu(Met)(2) molecular plane exhibited a perpendicular orientation with respect to the surface of silver nanoparticles. The electrochemical performance of Cu(Met)(2)/Ag/Graphene investigated by cyclic voltammetry displayed that the redox currents of Cu(Met)(2) were enhanced in the presence of Ag/Graphene. The electron paramagnetic resonance spectrum performed at room temperature showed that compared with Cu(Met)(2) powder the g value of Cu(Met)(2)/Ag/Graphene reduced slightly, indicating minor discrepancies of the local magnetic field around the copper ions between Cu(Met)(2) powder and Cu(Met)(2)/Ag/Graphene coupled nanoaggregates.