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1、ARTICLESPUBLISHEDONLINE:24APRIL2011
2、DOI:10.1038/NCHEM.1030Core@shellbimetallicnanoparticlesynthesisviaanioncoordinationChristopherJ.Serpell1,JamesCookson2,DoganOzkaya2andPaulD.Beer1*Core@shellstructuredbimetallicnanoparticlesarecurrentlyofimmenseinterestduetotheiruniqueelectronic,opticalandcataly
3、ticproperties.However,theirsynthesisisnon-trivial.Wereportanewsupramolecularrouteforthesynthesisofcore@shellnanoparticles,basedonananioncoordinationprotocol—thefirsttofunctionbybindingtheshellmetaltothesurfaceofthepre-formedprimarymetalcorebeforereduction.Theresultantgold/palladiumandplatinum/pall
4、adiumcore@shellnanoparticleshavebeencharacterizedbyaberration-correctedscanningtransmissionelectronmicroscopy(aswellasothertechniques),givingstrikingatomic-resolutionimagesofthecore@shellarchitecture,andtheuniquecatalyticpropertiesofthestructurednanoparticleshavebeendemonstratedinaremarkableimpro
5、vementoftheselectiveproductionofindustriallyvaluablechloroanilinefromchloronitrobenzene.nmaximizingtheenormouspotentialbenefitsofnanotechnology,tants24,25,galvanicdisplacement26,27,controlledsimultaneousakeychallengeistocontrolthefabricationofwell-definedreduction28–31,andexploitationofthermodynami
6、ccore/shellpre-Inanoparticulatematerialsusingnovelinnovativemethods.Oneferencesthroughannealing20,32.Despitethiswork,todatethereisofthemostcommonroutesforstabilizingnanoparticlesisstillnogeneralmethodforthereliablesynthesisofcore@shellnano-throughtheadditionofligandsduringtheirpreparation.particl
7、esforanytwometals.Herein,wepresentanewproof-of-However,ingeneral,theligandsactmerelyasaprotectiveshieldconceptmethod,reportinganovelroutetocore@shellnanoparticlestopreventagglomerationtobulkmaterials.Suchligand-stabilizedthatusesligand-basedsupramolecularforcestoensuresurfaceseg-materialscanbecon
8、sideredtobecoagulationsofatomicandmol-regationoftheshellmetalontothepre-formedcorebeforeitsecularcomponents,theassemblyandstabilityofwhichrelyonreduction.Theprincipleisdemonstratedthroughthesynthesisofcooperativesupram
