资源描述：
《au hierarchical micro nanotower arrays and their improved sers effect by ag nanoparticle decoration》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、DOI:10.1021/cg101266dAuHierarchicalMicro/NanotowerArraysandTheirImprovedSERS2011,Vol.11EffectbyAgNanoparticleDecoration748–752†,†,‡††ChuhongZhu,GuowenMeng,*QingHuang,*ZhulinHuang,andZhaoqinChu†KeyLaboratoryofMaterialsPhysics,AnhuiKeyLaboratoryofNanomaterialsandNanostructures,‡Institute
2、ofSolidStatePhysicsandKeyLaboratoryofIonBeamBioengineering,HefeiInstitutesofPhysicalScience,ChineseAcademyofSciences,Hefei,230031,ChinaReceivedSeptember27,2010;RevisedManuscriptReceivedJanuary5,2011ABSTRACT:ArraysofAuhierarchicalmicro/nanotowershavebeenachievedonAu-coatedsiliconplanars
3、ubstrate,viaelectrochemicaldepositioninamixedaqueoussolutionofPVPandHAuCl4underappropriateelectrodepositionconditions.TheAuhierarchicalmicro/nanotowerarrayshaveexhibiteddistinctsurface-enhancedRamanscattering(SERS)effectduetotheenhancedlocalelectromagneticfieldinthevicinityofthesharpna
4、notipsofthetowersandthegapsbetweentheneighboringnanotowers.Moreimportantly,theSERSeffecthasbeenfurtherimprovedsignificantlyviadecoratingAgnanoparticlesonthesurfacesoftheAuhierarchicalmicro/nanotowersduetotheAgnanoparticlehotspotsthemselvesandthehotspotsformedattheinterfacesbetweentheAg
5、nanoparticlesandtheAumicro/nanotowers.TheseAg-nanoparticle-decoratedAuhierarchicalmicro/nanotowerarrayshaveshownpotentialapplicationsassensitiveandrobustSERSsubstratesinmonitoringenviron-mentalpollutants,suchas3,30,4,40-tetrachlorobiphenyl(PCB-77).IntroductiontightlyonAu-coatedSiplanar
6、substrate.TheAuhierarchicalmicro/nanotowerarraysshoweddistinctSERSeffectduetoSurfaced-enhancedRamanscattering(SERS)hasbeentheirenhancedlocalelectromagneticfieldinthevicinityoftheintenselystudiedformanyyearsasagreatpotentialtoolfor1sharptowertipsandthegapsbetweentheneighboringnano-ultra
7、tracedetection.Noblemetal(especiallyAuandAg)towers.Furthermore,bydecoratingAgnanoparticlesonthenanocrystalswithdifferentmorphologieshavebeenreported2surfaceoftheAuhierarchicalmicro/nanotowersviaasub-asSERSsubstrates,suchasAunano-octahedra,nanoico-3456sequentelectrodeposition,hierarch
