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1、NanoRes(2008)1:273291DOI10.1007/s12274-008-8036-100273ReviewArticleRamanSpectroscopyandImagingofGrapheneZhenhuaNi,YingyingWang,TingYu,andZexiangShen（）DivisionofPhysicsandAppliedPhysics,SchoolofPhysicalandMathematicalSciences,NanyangTechnologicalUniversity,Singapore637
2、371,SingaporeReceived:17July2008/Revised:27August2008/Accepted:28August2008?TsinghuaPressandSpringer-Verlag2008.ThisarticleispublishedwithopenaccessatSpringerlink.comABSTRACTGraphenehasmanyuniquepropertiesthatmakeitanidealmaterialforfundamentalstudiesaswellasforpotent
3、ialapplications.HerewereviewrecentresultsontheRamanspectroscopyandimagingofgraphene.WeshowthatRamanspectroscopyandimagingcanbeusedasaquickandunambiguousmethodtodeterminethenumberofgraphenelayers.ThestrongRamansignalofsinglelayergraphenecomparedtographiteisexplainedbya
4、ninterferenceenhancementmodel.Wehavealsostudiedtheeffectofsubstrates,thetoplayerdeposition,theannealingprocess,aswellasfolding(stackingorder)onthephysicalandelectronicpropertiesofgraphene.Finally,RamanspectroscopyofepitaxialgraphenegrownonaSiCsubstrateispresentedandst
5、rongcompressivestrainonepitaxialgrapheneisobserved.Theresultspresentedherearehighlyrelevanttotheapplicationofgrapheneinnano-electronicdevicesandhelpindevelopingabetterunderstandingofthephysicalandelectronicpropertiesofgraphene.KEYWORDSGraphene,Ramanspectroscopyandimag
6、ing,substrateeffect,deviceapplicationIntroductionbehavelikemasslessDiracFermions[1].TheuniquepropertiesofgraphenemakeitapromisingcandidateGraphenecomprisesonemonolayerofcarbonatomsforfundamentalstudyaswellasforpotentialdevicepackedintoatwo-dimensional(2D)honeycombappl
7、ications[38].Thechargecarriersingraphenelattice[1].Ithasattractedmuchinterestsinceitwascanbetunedcontinuouslybetweenelectronsandfirstdiscoveredin2004[2].Grapheneisthebasic132holesinconcentrationsnashighas10/cm.Thebuildingblockforothercarbonnanomaterials,suchmobilityof
8、grapheneatroomtemperatureis~120000as0Dfullerenes,1Dcarbonnanotubes,and2Dcm2/(V·s),higherthananyknownsemiconductornanographit
