原子力显微镜AFM原理及操作手册.pdf
- 文档编号:14656698
- 上传时间:2023-06-25
- 格式:PDF
- 页数:60
- 大小:7.64MB
原子力显微镜AFM原理及操作手册.pdf
《原子力显微镜AFM原理及操作手册.pdf》由会员分享,可在线阅读,更多相关《原子力显微镜AFM原理及操作手册.pdf(60页珍藏版)》请在冰点文库上搜索。
Page1AsylumResearch2014AtomicForceMicroscopyPart2:
StandardmodesandapplicationsAsylumResearchPage2AsylumResearch2014CommonmodesofoperationAfewapplicationsAfewNEWapplications!
andsomecoolimagesPrinciplesofAFMPage3AsylumResearch2014ForcemeasurementsContactmodeAC(tapping)modeandsourcesoferrorinmeasurementsModesofOperationPage4AsylumResearch2014SampleLightSourceFocusingOpticsCantileverPositionSensitiveDetectoryxzShakePiezoVarythetip-sampleseparation,usuallywithoutfeedback-50Deflection(nm)-1.6-1.2-0.8-0.4ZPosition(m)F=-kxModesofOperationforcecurvesPage5AsylumResearch2014DeflVoltsVorDeflectionnmorForceNForce=(DeflVolts)*(DeflInvOLS)*(k)nNVnm/VnN/nmDeflectionTipsampledistancenmModesofOperationforcecurvesPage6AsylumResearch2014k=21.40.4pN/nm15x10-12105PowerSpectrum(nm/Hz)14kHz121086420Frequency(kHz)12kA212kBTEquipartitiontheoremquantifiesthermal(Brownian)motionAdvantages-“standard”-non-destructive-easytouseDisadvantages:
-mustfirstcalibratesensitivity-valuesgoodtoonly10%SpringconstantcalibrationModesofOperationforcecurvesPage7AsylumResearch2014ModesofOperationforcecurvesPage8AsylumResearch2014ArraysofForcecurvescanbeusedtocalculatethelocalstiffnessofasampleModesofOperationforcecurvesPage9AsylumResearch20146420-2nm-4.8-4.6-4.4-4.2-4.0-3.8mARTIFACTSopticalinterferencePage10AsylumResearch201420151050-5nm-50050nmARTIFACTStip/substrateinteractionPage11AsylumResearch2014302520151050nm1.41.21.00.80.60.40.20.0m0.5Hz5Hz10HzVelocity:
Increasingvelocityaddshysteresisbetweenapproach&retractportionsofcurveARTIFACTShydrodynamiceffectsPage12AsylumResearch2014BsurfacechargepullscantilevertosurfaceARTIFACTSsurfacechargingPage13AsylumResearch2014LaserMirrorCantileverQuadPDSurfaceVtLaserMirrorCantileverQuadPDSurfaceVtLaserMirrorCantileverQuadPDSurfaceVtLaserMirrorCantileverSurfaceQuadPDtVSurfaceLaserMirrorCantileverQuadPDSurfaceLaserMirrorCantileverQuadPDSurfaceLaserMirrorCantileverQuadPDModesofOperationcontactmodePage14AsylumResearch2014TipsampledistancenmDeflVoltsVPointoffirstcontactSetpointModesofOperationcontactmodeDeflectionfeedbackPage15AsylumResearch2014ChangesinheightwhilescanningaredisplayedonthecomputerastopographyModesofOperationcontactmodePage16AsylumResearch2014LaserMirrorCantileverQuadPDVSurfacetLaserMirrorQuadPDVCantileverSurfacetLaserMirrorCantileverQuadPDVSurfacetLaserMirrorQuadPDVCantileverSurfacetLaserMirrorCantileverQuadPDVSurfacetLaserMirrorCantileverQuadPDVSurfacetLaserMirrorCantileverQuadPDVSurfacetLaserMirrorCantileverQuadPDVSurfacetLaserMirrorCantileverQuadPDVSurfacetSurfaceLaserMirrorCantileverVtQuadPDSurfaceLaserMirrorCantileverQuadPDVtSurfaceLaserMirrorCantileverVQuadPDtSurfaceLaserMirrorCantileverQuadPDVtSurfaceLaserMirrorCantileverVtQuadPDModesofOperationAC(tapping)modePage17AsylumResearch2014Tip-sampledistanceAmplitudeSetpointFreeamplitudePointoffirstcontactModesofOperationAC(tapping)modeAmplitudefeedbackPage18AsylumResearch2014SampleLightSourceFocusingOpticsCantileverPositionSensitiveDetectoryxzShakePiezoZfeedback6050403020100m6050403020100mChangesinheightwhilescanningaredisplayedonthecomputerastopographyModesofOperationAC(tapping)modePage19AsylumResearch2014ARTIFACTS:
TipSize&ShapeEffectsImageisnotequivalenttoaphotograph.Weseeaconvolutionofsamplesurfacewithshapeoftip.Tipmustfitinbetweensurfacefeatures.Aslongastipissmallerthanfeatures,accurateXYrepresentationofsurface.VeecoPage20AsylumResearch2014ProbeSimulatorbyJosephGriffithSampleAFMTipMeasuredtopographyGoodTipBadTipReallyBadTipARTIFACTS:
TipSize&ShapeEffectsPage21AsylumResearch2014-1.0m-0.50.00.51.0ZSensor121086420m2umcubeparticles:
ImagessideoftipSurfaceimagestipARTIFACTS:
SurfaceimagesthetipPage22AsylumResearch20142.01.51.00.50.0m543210m-40-2002040nm2.01.51.00.50.0m543210m-40-2002040nmARTIFACTS:
FunkytipPage23AsylumResearch201486%setpoint55%setpoint5umx5um10umpitchVLSIcalibrationgrid;ACmodeimageinairparachutinggoodtrackingARTIFACTS:
ToomuchforceappliedPage24AsylumResearch2014Integralgain=40Integralgain=2Integralgain=95umx5umscan,10umpitchVLSIcalibrationgrid;ACmodeimageinairARTIFACTS:
Feedbackloopeffects(highgain)Page25AsylumResearch201448mV66mV500mV302520151050302520151050m5umx5um100umpitchVLSIcalibrationgrid;ACmodeimageinairARTIFACTS:
Feedbackloopeffects(driveamplitude)Page26AsylumResearch2014302520151050m302520151050m-20-1001020nm-200nm-150-100-500Height2520151050m302520151050m302520151050m-20-1001020nm-200nm-150-100-500Height302520151050mARTIFACTS:
ScanrateeffectsPage27AsylumResearch2014ImagesApplicationsmeasurementsPage28AsylumResearch2014250nmscanDNAinliquidImagesPage29AsylumResearch2014ConsecutiveupanddownscansofasingleDNAmoleculeinbuffertakenwitha30mleveratanamplitudeofabout8.Thenominalhelixpitchis3.4nm,withamajorgroovewidthof2.2nmandaminorgroovewidthof1.2nm.Youcansee6groovesalongthe10nmscalebar,soboththemajorandminorgrooveareclearlyresolved.DNAinliquidImagesPage30AsylumResearch2014CourtesyofS.MacLarenandH.WangUniversityofIllinoisatUrbana-Champaign.E.colionglass6mscanImagesPage31AsylumResearch2014LiveendothelialcellsDynamicEvents:
BeforeTreatmentwithMannitolImagecourtesyofZ.BlintandDr.G.Vr,InstituteofBiophysics,Szeged,HungaryImagesPage32AsylumResearch2014DynamicEvents:
AfterTreatmentwithMannitolImagecourtesyofZ.BlintandDr.G.Vr,InstituteofBiophysics,Szeged,HungaryImagesLiveendothelialcellsPage33AsylumResearch2014BacteriorhodopsinFoundincellmembranesofHalobacteriaAbsorbsphotonsandpumpsprotonsacrossthecellmembraneForms2DcrystallinepatchesthatcovermuchofthecellBioweb.wku.eduBecauseithasbeenextensivelystudiedbyAFM,itmakesagreatproteinreferencesample.ImagesPage34AsylumResearch2014Extracellularface,100nmscanBacteriorhodopsinImagesPage35AsylumResearch2014HeightLFMVaryingcoefficientoffrictioncausestorsionalor“lateral”bendingNanotribologyFunctionalizedtipsforchemicalforcemicroscopyApplicationsfrictionPage36AsylumResearch2014MFMMoS2Topographical3DimageofregionofanMoS2crystalshowingasinglestepScansize-500x500nm2ApplicationsroughnessPage37AsylumResearch2014MFMRoughnessmeasurementofthelowerstepTopographical3DimageofregionofanMoS2crystalshowingasinglestepScansize-500x500nm2ApplicationsroughnessPage38AsylumResearch2014Range:
RTto300C0.2Cprecision,0.5CaccuracyClosedlooptemperaturecontrolFullysealablePolypropyleneDiblockcopolymerApplicationsheatingPage39AsylumResearch2014Sub-picoAmptoAmprangeSamplebiasfrom-10to+10VSimultaneouslymapcurrentandtopographyRfRsampleVbiasCarbonnanotube-+VoutApplicationsconductiveAFMPage40AsylumResearch2014Sub-picoAmptoAmprangeLocallyprobeIVresponsefromaspecificpointBiasrampoptions:
triangle,sine,square,orcustomwaveZnOdopedwithEuCurrentnABiasmVApplicationsconductiveAFMPage41AsylumResearch2014VideotapeHarddriveGarnetTwopasstechniqueProvidesaqualitativemapofthemagneticfieldaboveasampleVarietyofmagnetictipsofvaryingcoercivityandmoment500nm20m18mApplicationsMagneticforcemicroscopyPage42AsylumResearch2014TwopasstechniqueSensitivetoconductorsandinsulatorsLateralresolutionaffectedbyfly-heightApplicationsElectricforcemicroscopyPage43AsylumResearch2014ACbiassenttotip(matchedtoo)DifferenceinpotentialcausescantileveroscillationsFeedbacksendsDCbiastocantilever,nullingoscillationsQuantitativemeasurementofthesurfacespotentialTrappedcharge,surfacepolarization,workfunction,orappliedvoltagecanbemeasured10mPCBboardtracesApplicationsKelvinprobeforcemicroscopyPage44AsylumResearch2014ElectricalbiastotipincontactwiththesurfaceinducesamechanicalresponseApplicabletopiezoandferroelectricsaswellasmanybiologicalsystemsHighvoltageoptionallowstheapplicationofupto220VtothesamplePZTApplicationspiezoresponseforcemicroscopyPage45AsylumResearch2014RelatedtomechanicalenergydissipationCandistinguishbetweenhardandsoftregionsPDESApplicationsphaseimagingPage46AsylumResearch2014ArrayofforcecurvesAutomatedextractionofmaterialsproperties(e.g.Elasticmodulus)ApplicationsforcemapsPage47AsylumResearch2014LossTangent-DropTestingtanWlossWstorageR.Lakes,ViscoelasticMaterials,Cambridge(2009)Page48AsylumResearch2014ApplicationsLossTangent/AMFMPage49AsylumResearch20141.Adjustthepre-factortomakeaknowncomponentbecorrect2.Referencesample(s)3.(Hertz,DMT,JKR)theory,dynamicsofanoscillatingcantileverSamplecourtesyofKenStrawhecker,ArmyResearchLabApplicationsAMFMfibersinepoxyPage50AsylumResearch2014AMFMonReinforcedComposites:
Kevlarinepoxy-radialPage51AsylumResearch2014CantileverdrivenatmultipleresonantmodesContrast(dissipation?
)notvisiblewithanyothertechniquesAbletoimagelongandshortrangeforcessimultaneouslyHarddiskCollagenApplicationsmultifrequencyPage52AsylumResearch2014Loadpicturefiles,makefreehandorgeometricalsketchesClosedlooppositioncontrolVectorbasedorbit-mappedmodesForcecanbeeitherheldconstantorvariedasdesiredGraphiteCarbonnanotubeApplicationsnanomanipulationPage53AsylumResearch2014Loadpicturefiles,makefreehandorgeometricalsketchesClosedlooppositioncontrolVectorbasedorbit-mappedmodesForcecanbeeitherheldconstantorvariedasdesiredcPolycarbonateSAMonAuApplicationsnanolithographyPage54AsylumResearch2014Ferroelectricpolarizationmodifiedthroughapplicationofbias
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 原子 显微镜 AFM 原理 操作手册
![提示](https://static.bingdoc.com/images/bang_tan.gif)