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Can Graphene be used as a Substrate for Raman Enhancement?
Ling, X; Xie, LM; Fang, Y; Xu, H; Zhang, HL(张浩力); Kong, J; Dresselhaus, MS; Zhang, J; Liu, ZF; Zhang, J (reprint author), Peking Univ, Coll Chem & Mol Engn,CNST, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci,Key Lab Phys & Chem Nano, Beijing 100871, Peoples R China.
Indexed BySCIE ; EI ; PubMed ; MEDLINE ; ESI
ESI NOTE2017-07-19;Highly Cited Papers
2010-02
Source PublicationNANO LETTERS
Volume10Issue:2
PublisherAMER CHEMICAL SOC
Publication PlaceWASHINGTON
AbstractGraphene is a monolayer of carbon atoms packed into a two-dimensional (2D) honeycomb crystal structure, which is a special material with many excellent properties. In the present study, we will discuss the possibility that graphene can be used as a substrate for enhancing Raman signals of adsorbed molecules. Here, phthalocyanine (Pc), rhodamine 6G (R6G), protoporphyin IX (PPP), and crystal violet (CV), which are popular molecules widely used as a Raman probe, are deposited equally on graphene and a SiO2/Si substrate using vacuum evaporation or solution soaking. By comparing the Raman signals of molecules on monolayer graphene and on a SiO2/Si substrate, we observed that the intensities of the Raman signals on monolayer graphene are much stronger than on a SiO2/Si substrate, indicating a clear Raman enhancement effect on the surface of monolayer graphene. For solution soaking, the Raman signals of the molecules are visible even though the concentration is low to 10(-8) mol/L or less. What's more interesting, the enhanced efficiencies are quite different on monolayer, few-layer, multilayer graphene, graphite, and highly ordered pyrolytic graphite (HOPG). The Raman signals of molecules on multilayer graphene are even weaker than on a SiO2/Si substrate, and the signals are even invisible on graphite and HOPG. Taking the Raman signals on the SiO2/Si substrate as a reference, Raman enhancement factors on the surface of monolayer graphene can be obtained using Raman intensity ratios. The Raman enhancement factors are quite different for different peaks, changing from 2 to 17. Furthermore, we found that the Raman enhancement factors can be distinguished through three classes that correspond to the symmetry of vibrations of the molecule. We attribute this enhancement to the charge transfer between graphene and the molecules, which result in a chemical enhancement. This is a new phenomenon for graphene that will expand the application of graphene to microanalysis and is good for studying the basic properties of both graphene and SERS.
KeywordGraphene Raman enhancement substrate vibrational symmetry
Department[Liu, Zhongfan] Peking Univ, Coll Chem & Mol Engn,CNST, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci,Key Lab Phys & Chem Nano, Beijing 100871, Peoples R China;
[Xu, Hua;
Zhang, Haoli] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China;
[Kong, Jing;
Dresselhaus, Mildred S.] MIT, Dept Elect & Comp Sci, Cambridge, MA 02139 USA
Subject AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Project NumberNSFC [50972001, 20725307, 5082106 1] ; MOST [2006CB932701, 2006CI3932403, 2007CB936203] ; U.S. NSF DHR [07-021197]
Funding Project国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 美国国家科学基金项目
Funding OrganizationNSFC [50972001, 20725307, 5082106 1]; MOST [2006CB932701, 2006CI3932403, 2007CB936203]; U.S. NSF DHR [07-021197] ; NSFC ; MOST ; US NSF
DOI10.1021/nl903414x
ISSN1530-6984
SubtypeArticle
Language英语
WOS IDWOS:000274338800034
EI ID20100812720201
PMID 20039694
First Inst
Citation statistics
Cited Times:570[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/76743
Collection化学化工学院
Corresponding AuthorZhang, J (reprint author), Peking Univ, Coll Chem & Mol Engn,CNST, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci,Key Lab Phys & Chem Nano, Beijing 100871, Peoples R China.
Recommended Citation
GB/T 7714
Ling, X,Xie, LM,Fang, Y,et al. Can Graphene be used as a Substrate for Raman Enhancement?[J]. NANO LETTERS,2010,10(2).
APA Ling, X.,Xie, LM.,Fang, Y.,Xu, H.,Zhang, HL.,...&Zhang, J .(2010).Can Graphene be used as a Substrate for Raman Enhancement?.NANO LETTERS,10(2).
MLA Ling, X,et al."Can Graphene be used as a Substrate for Raman Enhancement?".NANO LETTERS 10.2(2010).
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