Electrochemical surface-enhanced Raman spectroscopy of nanostructures.pdf

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1、ViewOnlineTUTORIALREVIEWwww.rsc.org/csr

2、ChemicalSocietyReviewsElectrochemicalsurface-enhancedRamanspectroscopyofnanostructuresDe-YinWu,Jian-FengLi,BinRen*andZhong-QunTian*Received19thMarch2008FirstpublishedasanAdvanceArticleontheweb3rdApril2008DOI:10.1039/b707872mTh

3、istutorialreviewfirstdescribestheearlyhistoryofSERSasthefirstSERSspectrawereobtainedfromanelectrochemicalcell,whichledtothediscoveryoftheSERSeffectinmid-1970s.Uptodate,over500papershavebeenpublishedonvariousaspectsofSERSfromelectrochemicalsystems.Wethenhighlightimporta

4、ntfeaturesofelectrochemicalSERS(EC-SERS).Therearetwodistinctivelydifferentpropertiesofelectricfields,theelectromagneticfieldandstaticelectrochemicalfield,co-existinginelectrochemicalsystemswithvariousnanostructures.Bothchemicalandphysicalenhancementscanbeinfluencedtosome

5、extentbyapplyinganelectrodepotential,whichmakesEC-SERSoneofthemostcomplicatedsystemsinSERS.GreateffortshavebeenmadetocomprehensivelyunderstandSERSandanalyzeEC-SERSspectraonthebasisofthechemicalandphysicalenhancementmechanismsinordertoprovidemeaningfulinformationforre

6、vealingthemechanismsofelectrochemicaladsorptionandreaction.TheEC-SERSexperimentsandapplicationsarethendiscussedfrompreparationofnanostructuredelectrodestoinvestigationofSERSmechanismsandfromcharacterizationofadsorptionconfigurationtoelucidationofelectrochemicalreacti

7、onmechanisms.Finally,prospectivedevelopmentsofEC-SERSinsubstrates,methodsandtheoryarediscussed.1Historyofelectrochemicalsurface-enhancedelectrodesurfacesasaqueoussolutiondoesnotleadtonotableRamanspectroscopyinterferencetothesurfacesignal.However,theRamanpro-cesshasi

8、tsintrinsicdisadvantageowingtotheverylowThefirstsurface-enhancedRamanscattering(SERS)spectradetectionsensitivity.Therefore,electrochemicalRamanex-wereobtainedfromanelectrochemicalcell,whichledtotheperimentswithoutenhancementwasimpracticalandjustdiscoveryoftheSERSeffec

9、tinmid-1970s.Inlookingback,impossibleforapplications.onemaynotbetoosurprisedaboutwhytheSERSresearchInordertoovercomethefatallimitationinth