Open AccessSurface-enhanced Raman scattering activities of graphene-wrapped Cu particles by chemical vapor deposition assisted with thermal annealing
Author(s) -
Jie Zhou,
Xinyu Wang,
Pengyue Zhang,
Jiamin Quan,
Yongtian Zhu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.024551
Subject(s) - materials science , raman scattering , chemical vapor deposition , raman spectroscopy , graphene , annealing (glass) , thermal stability , analytical chemistry (journal) , chemical engineering , nanotechnology , optics , composite material , chemistry , physics , engineering , chromatography
We presented a graphene-wrapped Cu particle hybrid system (G@Cu) to be used as a high performance surface-enhanced Raman scattering (SERS) substrate. The Cu particles wrapped by a few-layer graphene shell were directly synthesized on SiO 2 /Si by chemical vapor deposition assisted with thermal annealing in a mixture of methane and hydrogen. The detailed explanation on the different morphology of Cu particles induced by different thermal annealing condition was carried out with both qualitative and quantitative analysis and a series of G@Cu 3D models of Cu particles with different shape anisotropy and inter-particle gap were also built for further study of Raman enhancement mechanism. The G@Cu showed fine SERS activities, including the fluorescence quenching effect, the stability of Raman signals, chemical and optical stability, with an enhancement factor (EF) of ~1.5 × 10 6 .