▎ 摘　　要

Multilayer graphene-enclosed nickel nanoparticles have been prepared on the SiO2/Si substrate using chemical vapor deposition. Rhodamine 6G was used as a molecule probe to detect if the multilayer graphene-enclosed nickel nanoparticles can be applied in surface-enhanced Raman spectroscopy. The experimental results indicated that the Raman signals of C-C stretching within the benzene ring of rhodamine 6G can be observed only on the multilayer graphene-enclosed nickel nanoparticle substrate rather than on reference substrates such as SiO2/Si and Ni/SiO2/Si. This suggests that the mechanism of Raman enhancement for rhodamine 6G molecules on graphene is through the pi-pi bond coupling between them.