Open AccessPlasmonic coupling of silver nanoparticles covered by hydrogen-terminated graphene for surface-enhanced Raman spectroscopy
Author(s) -
Chih Yi Liu,
Keng Chih Liang,
Waileong Chen,
Chia Hao Tu,
Chuan Pu Liu,
Yonhua Tzeng
Publication year - 2011
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.19.017092
Subject(s) - graphene , materials science , raman spectroscopy , surface enhanced raman spectroscopy , plasmon , silver nanoparticle , nanoparticle , nanotechnology , adsorption , spectroscopy , surface plasmon resonance , surface plasmon , chemical engineering , raman scattering , optoelectronics , optics , chemistry , organic chemistry , physics , engineering , quantum mechanics
We report on strong plasmonic coupling from silver nanoparticles covered by hydrogen-terminated chemically vapor deposited single-layer graphene, and its effects on the detection and identification of adenine molecules through surface-enhanced Raman spectroscopy (SERS). The high resistivity of the graphene after subjecting to remote plasma hydrogenation allows plasmonic coupling induced strong local electromagnetic fields among the silver nanoparticles to penetrate the graphene, and thus enhances the SERS efficiency of adenine molecules adsorbed on the film. The graphene layer protects the nanoparticles from reactive and harsh environments and provides a chemically inert and biocompatible carbon surface for SERS applications.