Surface enhanced Raman spectroscopy on a flat graphene surface

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	Surface enhanced Raman spectroscopy on a flat graphene surface
	Xu, WG ; Ling, X ; Xiao, JQ ; Dresselhaus, MS ; Kong, J ; Xu, HX ; Liu, ZF ; Zhang, J
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2012
卷号	109 期号:24 页码:9281
关键词	SILVER ELECTRODE SCATTERING PYRIDINE NANOPARTICLES MOLECULES SPECTRA SERS FLUORESCENCE SUBSTRATE UNIFORM
ISSN号	0027-8424
通讯作者	Zhang, J (reprint author), Peking Univ, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn,Ctr Nanochem, Key Lab Phys & Chem Nanodevices,Beijing Natl Lab, Beijing 100871, Peoples R China.
中文摘要	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.
收录类别	SCI
资助信息	MOST [2011YQ0301240201, 2011CB932601]; NSFC [51121091, 50972001, 21129001]; Fundamental Research Funds for the Central Universities; [NSF/DMR-1004147]; [NSF/DMR-0845358]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/54170]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Xu, WG,Ling, X,Xiao, JQ,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,2012,109(24):9281.
APA	Xu, WG.,Ling, X.,Xiao, JQ.,Dresselhaus, MS.,Kong, J.,...&Zhang, J.(2012).Surface enhanced Raman spectroscopy on a flat graphene surface.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,109(24),9281.
MLA	Xu, WG,et al."Surface enhanced Raman spectroscopy on a flat graphene surface".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 109.24(2012):9281.