Fig. 4
From: Plasmonic sensors based on graphene and graphene hybrid materials
Roles of graphene in graphene-based plasmonic materials. a Graphene as a FL quencher: comparisons of Raman signals of R6G and PPP deposited on graphene (red line) and on the SiO2/Si substrate (blue line) at 514.5 nm excitation and 632.8 nm excitation. The asterisk (*) indicates G-band peak of graphene. Reprinted with permission from [54]. Copyright 2010 American Chemical Society. b, c Graphene as a substrate material for hybrid structures: b Schematic diagram of R6G molecules attached on AuNPs/graphene/SiO2/Si substrate for SERS, c Raman spectra for R6G on AuNPs/graphene/SiO2/Si (red), AuNPs/SiO2/Si (cyan), graphene/SiO2/Si (blue), and bare SiO2/Si (black). Reprinted from High sensitivity surface enhanced Raman spectroscopy of R6G on in situ fabricated Au nanoparticle/graphene plasmonic substrates, Rongtao Lu et al., Copyright 2015, with permission from Elsevier [64]