Surface enhanced Raman spectroscopy on a flat graphene surface

doi:10.1073/pnas.1205478109

CORC > 北京大学 > 信息科学技术学院

	Surface enhanced Raman spectroscopy on a flat graphene surface
	Xu, Weigao ; Ling, Xi ; Xiao, Jiaqi ; Dresselhaus, Mildred S. ; Kong, Jing ; Xu, Hongxing ; Liu, Zhongfan ; Zhang, Jin
刊名	proceedings of the national academy of sciences of the united states of america
	2012
关键词	atomically smooth substrate metal-molecule isolation signal fluctuation mediator application SILVER ELECTRODE SCATTERING PYRIDINE NANOPARTICLES MOLECULES SPECTRA SERS FLUORESCENCE SUBSTRATE UNIFORM
DOI	10.1073/pnas.1205478109
英文摘要	Surface enhanced Raman spectroscopy (SERS) is an attractive analytical technique, which enables single-molecule sensitive detection and provides its special chemical fingerprints. During the past decades, researchers have made great efforts towards an ideal SERS substrate, mainly including pioneering works on the preparation of uniform metal nanostructure arrays by various nanoassembly and nanotailoring methods, which give better uniformity and reproducibility. Recently, nanoparticles coated with an inert shell were used to make the enhanced Raman signals cleaner. By depositing SERS-active metal nanoislands on an atomically flat graphene layer, here we designed a new kind of SERS substrate referred to as a graphene-mediated SERS (G-SERS) substrate. In the graphene/metal combined structure, the electromagnetic "hot" spots (which is the origin of a huge SERS enhancement) created by the gapped metal nanoislands through the localized surface plasmon resonance effect are supposed to pass through the monolayer graphene, resulting in an atomically flat hot surface for Raman enhancement. Signals from a G-SERS substrate were also demonstrated to have interesting advantages over normal SERS, in terms of cleaner vibrational information free from various metal-molecule interactions and being more stable against photo-induced damage, but with a comparable enhancement factor. Furthermore, we demonstrate the use of a freestanding, transparent and flexible "G-SERS tape" (consisting of a polymer-layer-supported monolayer graphene with sandwiched metal nanoislands) to enable direct, real time and reliable detection of trace amounts of analytes in various systems, which imparts high efficiency and universality of analyses with G-SERS substrates.; Multidisciplinary Sciences; SCI(E); 0; ARTICLE; 24; 9281-9286; 109
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/313102]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Xu, Weigao,Ling, Xi,Xiao, Jiaqi,et al. Surface enhanced Raman spectroscopy on a flat graphene surface[J]. proceedings of the national academy of sciences of the united states of america,2012.
APA	Xu, Weigao.,Ling, Xi.,Xiao, Jiaqi.,Dresselhaus, Mildred S..,Kong, Jing.,...&Zhang, Jin.(2012).Surface enhanced Raman spectroscopy on a flat graphene surface.proceedings of the national academy of sciences of the united states of america.
MLA	Xu, Weigao,et al."Surface enhanced Raman spectroscopy on a flat graphene surface".proceedings of the national academy of sciences of the united states of america (2012).