资源描述：
《Shape-Controlled Synthesis of Metal Nanostructures The Case of Silver.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、4542005Wiley-VCHVerlagGmbH&Co.KGaA,WeinheimDOI:10.1002/chem.200400927Chem.Eur.J.2005,11,454–463CONCEPTSShape-ControlledSynthesisofMetalNanostructures:TheCaseofSilver++[a]BenjaminWiley,YugangSun,BrianMayers,andYounanXia*shape,composition,crystallinity,andstructure(e
2、.g.,solidAbstract:Theconceptofshape-controlledsynthesisis[2]versushollow).Particularemphasishasrecentlybeendiscussedbyinvestigatingthegrowthmechanismsforplacedonthecontrolofshape,becauseinmanycasesitsilvernanocubes,nanowires,andnanospheresproducedallowsonetofinetune
3、thepropertieswithagreaterversatil-throughapolymer-mediatedpolyolprocess.Experimen-itythancanbeachievedotherwise.Forexample,computa-talparameters,suchastheconcentrationofAgNO3tionalworkhaspredictedthat,forsilverorgoldnanoparti-(theprecursortosilver),themolarratiobetw
4、eenpoly-cles,thenumberandpositionofsurfaceplasmonresonance(vinylpyrrolidone)(PVP,thecappingagent)andAgNO3,(SPR)peaks,aswellastheeffectivespectralrangeforsur-andthestrengthofchemicalinteractionbetweenPVPface-enhancedRamanscattering(SERS),arestronglyde-andvariouscryst
5、allographicplanesofsilver,werefound[3]pendentontheparticleshape.Experimentally,thelongitu-todeterminethecrystallinityofseeds(e.g.,singlecrys-dinalSPRmodesofsilverandgoldnanorodshavebeentalversusdecahedralmultiplytwinnedparticles).In[4]showntogreatlyred-shiftwithincr
6、easingaspectratio.Inturn,thecrystallinityofaseedandtheextentoftheaddition,arrayedtriangularnanoparticlesofsilverhavePVPcoverageontheseedwerebothinstrumentalinbeendemonstratedaseffectivesubstratesforSERSinthecontrollingthemorphologyoffinalproduct.Theabilityspectralra
7、ngefrom700to800nm,whilesphericalnanopar-togeneratesilvernanostructureswithwell-definedmor-ticlesofsilveraremostsuitableintherangeof530tophologiesprovidesagreatopportunitytoexperimental-[5]570nm.Withregardtocatalysis,cubicnanoparticlesoflyandsystematicallystudytherel
8、ationshipbetweenplatinumwithsurfacesenclosedbythe{100}facetscatalyzetheirpropertiesandgeometricshapes.reactionsinvolvinghydrogen,whilether
