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化学前沿——核壳结构材料入门.ppt

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Zhangshutingscau2010WhyCore-Shell?1.1Metal@metalcore-shellNanostructures1.2Metal@SiO2Ag@SiO2preperationEffectofpHontheadsorptionofAPSandSiO32-Langmuir,Vol.14,No.14,1998Ag/SiO2usingreversemicelleandsol–geltechniqueLangmuir2003,19,6693-6700FibonacciNumberPatternsonAg@SiOxMicrostructures1.3metal@carbonLangmuir2005,21,6019-6024Langmuir2005,21,6019-6024AsahighlyefficientplasmonicphotocatalystAngew.Chem.Int.Ed.2007,46,4909–4912MagneticSeparationsinOrganicSynthesisMagneticSeparationsinOtherAspectNanoscaleResLett(2008)3:87–1041.4metal@ploymer(1)Polyelectrolytelayer-by-layerself-assemblyAngew.Chem.Int.Ed.1998;37:2201–2205.multilayereddrugdeliverysystembyLbLassemblyTEMimagesofdried(a)CaCO3templatesand(b)hollowcapsulesof(PGEDMC/PSS)4.5madeon2.8mCaCO3.Theinsetin(a)showstheSEMimageofatypicalCaCO3particle+shellconsistsofFe3O4/poly(diallyldimethylammoniumchloride)(PDDA)Self-AssemblyofPolymer-CoatedAgNanoparticlesnanoparticle–ligandsystems,variousgroupsbindingtometalsurfacesDisulfides:Langmuir1998,14,7378–7386;Langmuir2005,21,12064–12067;Langmuir2007,23,2126–2132;Langmuir2001,17,271–273.ChemMater2003,15,20–28Example:(3)Metal@PolymerbyminiemulsionpolymerizationExample:TEMphotographsofSiO2@polystyreneusingdifferentSLSconcentrationsAg@PolymerviaMiniemulsionPolymerizationExtinctionspectraofsilverparticles:(A)uncoatedparticlesand(B)polystyrenecoatedparticles.Solidline:suspensioninwater.Dottedline:suspensioninwater,after1hin1.8MNaCl.FabricationofAgCl@Polypyrrole-ChitosanCore-ShellNanoparticlesTEMimagesof(b)AgCl@PPy-CSnanoparticles,and(c)PPy-CShollownanospheres.Reactionconditions:20mLofchitosan(1wt%,in0.05MHNO3),0.01gofAgNO3,0.025mLofpyrrole,and0.14gofFeCl3.Thereactiontemperatureis2℃.FabricationofAgCl@Polypyrrole-ChitosanCore-ShellNanoparticlesMetal@PolymerbyMiniemulsionPolymerization：multi-coreRepresentativetransmissionelectronmicrographfromsynthesisofcompositepolymer–goldnanoparticlesusingoleylamine-stabilizedgoldnanoparticles.Insetattoprightshowsbothgoldnanoparticleaggregationandincomp