n-羟基苯甲酸(n=p,m,o)在一种新的活性基底上的SERS研究(英文)

资源类型:pdf 资源大小:405.00KB 文档分类:数理科学和化学 上传者:李仰征

相关文档

批量下载下列文档

文档信息

【关键词】氧化铟锡导电玻璃 银纳米颗粒 羟基苯甲酸 表面增强拉曼散射 

【出版日期】2005-03-30

【摘要】将银纳米颗粒覆盖在覆有铟锡氧化物的导电玻璃上,可以将其作为一种新型的表面增强拉曼散射(SERS)活性基底。将三种羟基苯甲酸分子作为探针分子在这种新的基底上进行检测,得到了很好的SERS信号,从中可反映出大量分子振动信息

【刊名】光散射学报

全文阅读

Agnano - particles[1 ] organizedonIndiumTinOxide (ITO)surfacecanactasanewSurfaceEn hancedRamanScattering (SERS)activesubstrateaswellasadryelectrode Comparedwiththetradi tionalSERSactivesubstrate[2 ] ,itsmainstrongpointisthat:whentheinvestagationofthefilm selec tricityandothermacroscopicalcharacteristicistakenplace ,themicrocosmicchangesofthefilmcanbeshownupbytheSERSspectrumaswell Totextthequalityofthisnewsubstrate ,theSERSspectraofaSeriesofn -hydroxybenzoicAcids(n =P ,MandO)adsorbedonitwerestudied ThesolidFT -Ramanspectrum (a) ,FT -SERSspectrainsilvercolloidalsolution (b)andonthesilver-coatedITO (c)forPHBA ,MHBAandOHBAarere spectivelyrepresentedinFig1 ,Fig3andFig 5 ItisobviousthattheSERSactivityofthesilver -coatedITOissuperiortothatofthesilvercolloidalsolution ,andtheinformationreflectedbyFig (c)isalsomorethanthatbyFig (b) ,indicatingthatthesilver -coatedITOisahighlySERS -activesub strate ForthePHBAinsilvercolloid ,thebroadbandemergedat 1 40 9cm- 1 belongingtotheCOOsym metricstretchingshowstheinteractionbetweenmoleculesandthesilverfilmisdirectlyviathecarboxylgroup Also ,the 863cm- 1 bandassignedtotheC -COO- stretchingwhichincludetheν(C -CO2 ˉ)vi brationmodeisverysharp ,indicatingthattheC -CO2 ˉgroupisperpendicularlyadsorbedontothesfaceofthesilvernano - particles(Fig 2a) Butonthesilver -coatedITO(Fig 1a) ,comparedwiththecorrespondingbandsinFig1b ,theadsorptionorientationbetweencarboxylandthesilverhascertainlychanged AccordingtotheSERSselectionrules[3] ,theorientationofC -CO2 ˉmaynolongerbevertical,andthestrongintensitiesofsomein - planevibrationmodesshowingthatthebenzeneringisclosetothesurfaceofsilvernano - particles (Fig3b) TheanalysisofMHBAandOHBAaresimilertothePHBA  Fig.1 ThesolidFT -Ramanspectrum (a) ,FT -SERSspectrainsilvercolloidalsolution (b)andonthesilver -coatedITO (c)forPHBAFig.2 TheprobableorientationofPHBAinsilvercolloidalsolution (a)andonsilvercoatedITO(b) Fig.3 ThesolidFT -Ramanspectrum (a) ,FT -SERSspectrainsilvercolloidalsolution (b)andonthesilver-coatedITO (c)forMHBAFig.5 ThesolidFT -Ramanspectrum (a) ,FT -SERSspectrainsilvercolloidalsolution (b)andonthesilver-coatedITO (c)forOHBA Fig.6 theprobableorientationofOHBAinsilvercol loidalsolution (a)andonsilvercoatedITO (b)n-羟基苯甲酸(n=p,m,o)在一种新的活性基底上的SERS研究(英文)氧化铟锡导电玻璃;;银纳米颗粒;;羟基苯甲酸;;表面增强拉曼散射将银纳米颗粒覆盖在覆有铟锡氧化物的导电玻璃上,可以将其作为一种新型的表面增强拉曼散射(SERS)活性基底。将三种羟基苯甲酸分子作为探针分子在这种新的基底上进行检测,得到了很好的SERS信号,从中可反映出大量分子振动信息[1] P C LeeandD Meisel,J PhysChem1982,86:3391 [2] J Fagerstrometal.PhysicsReviewB ,1993,48(15):11367. [3] M Pagannone,B FornariandG Mattei,SpectrochimicaActaA ,1987,43:621.

1

问答

我要提问