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石墨烯形貌物相.pptx

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Thecharacterizationofgrephene班级:09级材料三班组员:朱杉(编辑校稿)张强(文章撰写)高厚仁(资料收集)陈宏翔(文章撰写)开赛尔江(其他)石墨烯的表征方法

1IntroductionGrapheneatwo-dimensional,single-layersheetofsp2-hybridizedcarbonatoms,hasattractedtremendousattentionandresearchinterest,owingtoitsexceptionalphysicalproperties.0102

1.1SynthesisofgraphenechanicalexfoliationChemicalvapordeposition(CVD)ChemicallyderivedgrapheneOthersynthesisapproaches

1.2PropertiesandcharacterizationGoodthermalstabilityExcellentmechanicalstrengthHighelectronicconductivity

2MorphologyanalysisAtomForceMicroscope(AFM)1ScanningTunnelMicroscope(STM)2ScanningElectronMicroscope(SEM)3OpticalMicroscope(OM)4

PreparationObservationPerformancetest2.1AFM

Fig1.SEMimagesofearlyattemptsatmechanicalexfoliationusinggraphitepillars

Fig2.3DmodelofAFMtip/specimencontact

logoFig3.Mechanicalexfoliationproducedtheveryfirstsinglelayergrapheneflakes.

Fig4.(a)8μmx8μmAFMtopography(b)Pseudo-3Drepresentation

Fig5.SchematicofAFMtip/specimencontactundernegativeandpositiveappliedloads.Fig6.

Fig7.AFMimageofthegraphenespecimen,2Dprofilesatthesixdifferentregionsandthethicknessatthesixsitesindicatedontheimage

Fig8.AFMimagesofgraphenespecimen(a)beforeand(b)afterweartest.Fig9.(a)AFMimageofweartracksand(b)thecross-sectionsofweartracks.

2MorphologyanalysisAtomForceMicroscope(AFM)ScanningTunnelMicroscope(STM)ScanningElectronMicroscope(SEM)OpticalMicroscope(OM)

2.2STMFig10.(a)STMimageofgraphiteshowingonlythethreecarbonsthateclipseaneighborinthesheetdirectlybelow.(b)Incontrast,allsixcarbonsareequivalentandthusvisibleinmechanicallyexfoliatedsingle-layergraphene.

2MorphologyanalysisAtomForceMicroscope(AFM)1ScanningTunnelMicroscope(STM)2ScanningElectronMicroscope(SEM)3OpticalMicroscope(OM)4

2.3SEMFig11.G

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