Wet-Chemical Synthesis of Pd-Au Core-Shell Nanoparticles (8 nm)：From Nanostructure to Biological Properties.docx

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1、DOI:10.100NSICt.201800638z_Materia1sScienceinc.Nanomateria1s&Po1ymersWet-Chemica1SynthesisofPd-AuCore-She11Nanopartic1es(8_nm):FromNanostructuretoBio1ogica1Properties78 A1exanderRoStek,MarinaBreiSCh,同Kateryna1ozaJa1Pau1oR.A.F.Garciac19 Gfistiano1.P.O1iveiraJcjOIegPrymakMMarCHeggen,dManfredKo11erb1io

2、OristinaSengstockz1b1andMatthiasEpp1e*fa,111213PdAucore-she11nanopartic1eswithapa11adiumcore(diameter14about5.5nm)andago1dshe11(thicknessabout1.7nm)werewet-chemica11ysynthesizedinaneasywater-basedone-pot162+3+synthesisbysequentia1reductionofPdandAuwith17g1ucoseinthepresenceofpo1y(N-viny1pyrro1idone)

3、(PVP).Themeta1sarepresentinaboutequa1amounts(mo1arratioPd:Auabout2:1)withac1earseparationbetweencoreandshe11.The20reactionwasmonitoredin-situbysma11-ang1eX-rayscattering21(SAXS),showingtheinitia1growthofthepa11adiumseeds,22fo11owedbytheepitacticformationofthego1dshe11.Thecore-232425 Intreduction26In

4、organicandmeta11icnanopartidesrepresentawe11-estab27Iishedfie1dofnanoscience,medicine,cata1ysis,andindustry.28Nob1emeta1s1ikerhodium,pa11adium,p1atinum,si1ver;andgo1dareofspecia1interest.Core-she11nanostructuresandnano-30a11oysp1ayimportantro1esandopenupnewpossibi1itiesdue31totheirtuneab1eproperties

5、,e.g.inheterogeneouscata1ysis.e1ectrocata1ysis,magnetism,andbiomedica1app1ications.In33PartiCU1ar7pa11adium-go1dnanopartides(PdAU)areOfCOnSid34 enab1einterestinheterogeneouscata1ysis,e.g.forvariousredox35 4)reactions.Thisismain1yascribedtothemodu1ationofthe36 propertiesofpa11adiumbya11oyingitwithgo1

6、d,bothe1ectroni-wca11yandstructura11y.Zhangeta1.havepub1ishedacompre-38hensivereviewaboutthesynthesisandthepropertiesof39PdAubimeta11icnanopartic1es,incore-she11form(PdAuand40AuPd)andina11oyedform,inc1udingnon-spherica1nano-4partic1es.a A.Rostek,Dr.K.1oza,Dr.O.Prymak,Prof.Dr.M.Epp1eInorganicChemistr

7、yandCenterforNanointegrationDuisburg-(EssenCeNIDE),UniversityofDuisburg-Essen,Universitaetsstr.7,45141Essen,47GermanyE-maii:matthias.epp1euni-due.de48b M.Breisch,Prof.Dr.M.K11er,Prof.Dr.C.SengstockBergmannshei1UniversityHospita1/Surgica1Research,Ruhr-UniversityofBochum,Brk1e-de-1a-Camp-P1atz1,44789B

8、ochum,Germanyc P.R.A.F.Garcia,Prof.Dr.C.1.P.O1iveiraInstituteofPhysics,UniversityofSoPau1o,RuadoMato1371,SoPau1o,SoPau1o,05314-970,Brazi1d Dr.M.HeggenErnstRuskaCentreforMicroscopyandSpectroscopywithE1ectrons,ForschungszentrumJ1ichGmbH,52425J1ich,GermanySupportinginformationforthisartic1eisavai1ab1eo

9、ntheWWWunderhttps:/doi.org/10.1002/s1ct.201800638she11characterofthepartic1eswasconfirmedbyKighreso1utionscanningtransmissione1ectronmicroscopy(STEM)andenergy-dispersiveX-rayspectroscopy(EDX).HowevecXraypowderdiffractionwithRietve1dana1ysisindicatedapartia1a11oying,i.e.agradua1borderbetweenthetwomet

10、a1s.Ce11cu1tureexperimentsshowednoadverseeffectsonhumanmesenchyma1stemce11s(hMSCs)withaPdAunanopartic1econcentration(computedastota1meta1)upto50mgm11after24hincubation,i.e.thepartic1escanbeconsideredasbio1ogica11yharm1ess,evenafterunintendedhumanexposure.Anumberofexperimenta1andtheoretica1reportshas

11、beenpub1ishedaboutthePdAusystem,rangingfroma11oyednanopartic1estophysica11ypreparedthinfi1ms.Zhangeta1.haveprepareda11oyedPdAunanopartic1eswithadiameterofabout502345to60nmbyco-reductioninthepresenceofCu2*,a1soinporousform.151Kuna1eta1.havereportedamicrowavebasedsynthesisofa11oyedPdAunanopartic1es(po

12、1yo1process)withabout2.5nmdiameterwithvariab1ecompositionandtestedtheminthecata1ytichydrogenationofa1kenes.6Hahneta1.havepreparedthinfi1msofPdAu(thicknessabout100-150nm)forthee1ectrocata1yticreductionofCO2.Prevoteta1.haveinvestigatedthetherma1behaviourofcarbon-supportedPdAunanopartic1es(3.4nm;about4

13、0at%Pd).Theyfoundthatdea11oyingoccurredafter10hat6008C,inc1udinganOstwa1d-ripeningof1argepartic1esontheexpenseofsma11partic1es.s,Twokindsofcore-she11partic1escanbeprepared:Go1dcore/pa11adiumshe11(AuPd)andpa11adiumcore/go1dshe11(PdAu).Thefirstsystemiseasiertoprepareasthereisnoga1vanicrep1acementwhena

14、ddingpa11adiumionstoameta11icgo1dcore.141Itisa1soofdirectinterestforpa11adium-basedheterogeneouscata1ysis.Go1dnanocubeswerecoatedwitha1ayerofpa11adiumby1ieta1.(fu11diameterdownto12nm)byaseed-mediatedsynthesis.191Spita1eeta1.havepreparedAuPdcoreshe11nanopartic1es(6nmAucore,2nmPdshe11thickness)andcarr

15、iedoutatomisticsimu1ationsonthissystem.10deSantiseta1.havestudiedtheformationofAuPdcore-she11nanopartic1esofvariousdiameters(around100nm)andshapesbyanextensivevariationoftheseeded-growthmethodparamaters.,nForthepreparationofcore-she11structureswithapa11adiumcoreandago1dshe11,aga1vanicrep1acementofpa

16、11adiummeta1bygo1dions(oxidativeetching)mustbeavoided.Here,thereducingagentmustbeproper1ychosen.Gopa1aneta1.havestudiedthecata1yticperformanceofPdAucore-she11nanopartic1es(5nmPdcore,5nmAushe11thickness).11211imeta1.havepreparedpa11adiumnanocubes(about5nmedge1ength)andcoatedthemwithathin1ayerofgo1d(about2-1313nmthickness).Mazumdereta1