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1、SupportingInformationElectrospunTiO2Nano-FeltSurface-DecoratedwithAgNanoparticlesasSensitiveandUV-CleanableSubstrateforSurfaceEnhancedRamanScattering†,§‡,§††‡,†,YongZhao,LeiSun,MinXi,QuanFeng,ChaoyangJiang,*andHaoFong*†DepartmentofChemistryandAppliedBiologicalSciences,SouthDa
2、kotaSchoolofMinesandTechnology,RapidCity,SD57701,USA‡DepartmentofChemistry,UniversityofSouthDakota,Vermillion,SD57069,USA§Theseauthorscontributedequallytothiswork.TitleRunningHead:ElectrospunTiO2/AgNano-FeltasCleanableSERSSubstrate*CorrespondingAuthors:ProfessorHaoFong,Ph.D.T
3、el.:(605)394-1229,Fax:(605)394-1232,E-mail:Hao.Fong@sdsmt.eduProfessorChaoyangJiang,Ph.D.Tel.:(605)677-6250,Fax:(605)677-6397,E-mail:Chaoyang.Jiang@usd.edu1FigureS1.RepresentativeTEMimagesofTiO2/Ag-10minnano-feltwithvariedmagnifications.50020min10min3min1min0minIntesnity(a.u.
4、)60080010001200140016001800-1Ramanshift(cm)FigureS2.RamanspectraofneatTiO2,TiO2/Ag-1min,TiO2/Ag-3min,TiO2/Ag-10min,and-3TiO2/Ag-20minnano-felts(afterbeingtreatedwith10M4-MBAsolution).2FigureS3.ThehistogramsofRamanintensityacquiredfromsixdifferentareas(15×15µm)of-3neatTiO2nano
5、-felt(afterbeingtreatedwith10M4-MBAsolution).TheRamansignalwas-1acquiredat1580cm.FigureS3showsthehistogramsofRamanintensityacquiredfromsixdifferentareas(15×15-3µm)ofneatTiO2nano-feltsbyusing10M4-MBAastheprobeanalyte.Gaussiancurveswereappliedtofitthehistograms,indicatingthenor
6、maldistributionofSERSintensitiesintheareaof-3interest.ItwasevidentthattheaverageRamansignalofneatTiO2for10M4-MBAwasmerely1.57±8.19.31000-310M−47.5×10M−45.0×10M−42.5×10M-410M-510MIntensity(a.u.)-610M-710M60080010001200140016001800-1Ramanshift(cm)FigureS4.RamanspectraofTiO2/Ag-
7、10minnano-feltversus4-MBAconcentration.-7500TiO-10min(10M4-MBA)2-1NeatTiO(10M4-MBA)Intensity(a.u.)2400600800100012001400160018002000-1Ramanshift(cm)-7FigureS5.TheRamanspectrumofTiO2/Ag-10minnano-felt(afterbeingtreatedwith10M4-MBAsolution),andtheRamanspectrumofneatTiO2nano-fel
8、t(afterbeingtreatedwith0.1M4-MBAsolution).Intheory,thefollowingequat
