金属汇报说明材料合成与制备讲义.pdf

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1、Chapter4-2:Synthesisofmetalnanoparticlesandfilms•4.2.1Introduction•4.2.2Chemicalreductionmethod:(synthesisofAuandbi-metallicnanoparticles)•4.2.3Electrochemicalreduction•4.2.4Hydrothermal•4.2.5Photochemical•4.2.6Sonochemical•4.2.7ChemicalVaporDeposition•

2、4.2.8PhysicalVaporDeposition(Vacuumevaporation)Keyword:Reduction4.2.1IntroductionNanomaterialsisnotnew…nanoscienceis.TEMAnalysistop:TEMof4nmAu–lightpinkChi’enLungDynasty(1736-96)bottom:TEMof30nmAu–deepredGoldnanosphereswithincreasingdiametersizeBulkAu4n

3、m12nm25nm37nm•Opticalpropertiesofmetalnanoparticlesdependontheirshapeandsize•Particlefunctionalizationcanbedoneonthesurface•VisibleopticalchangesoccurMichaelFaraday1791-09-22–1867-08-25(aged75)Residence:EnglandNationality:BritishFields:PhysicsandChemist

4、ryInstitutions:RoyalInstitutionKnownfor:Faraday'slawofinductionElectrochemistryFaradayeffectPortraitbyHenryWilliamPickersgill,ca.1820FaradaycageFaradayconstantFaradaycupFaraday'slawsofelectrolysisFaradayparadoxFaradayrotatorFaraday-efficiencyeffectFarad

5、aywaveFaradaywheelLinesofforce“Faraday'sGold”andGold“sols”LecturegivenonJune12th1858,entitled'OntherelationofGoldtoLight'M.Faraday,'TheBakerianlecture:experimentalrelationsofgold(andothermetals)tolight',PhilosophicalTransactionsoftheRoyalSocietyofSlidet

6、hatFaradayusedinhislectureonLondon,Vol.147(1847),145-181goldsols,in1858Faradaydiscoveredthathecouldturnthepreparationbluebyaddingcertainsalts.Goldsolsalsocoagulatedwhensaltswereadded,althoughthiscouldbepreventedbytheadditionofgelatin.5HAuCl+3P+12HO→5Au+

7、20HCl+3HPO42343+3−−6Au+CHO+15OH→6Au+6CO+10HO65722MesogoldMesogold:http://www.purestcolloids.com/index.htmMesoGoldis0.9999puregoldincolloidalform.•Allnaturalmineralsupplement-colloidalgold.•Noadversesideeffectshaveeverbeenreported.•Atruecolloidalgoldisru

8、byredasshowninphoto.•Containsonlypurewaterandpuregoldnanometersizedparticles.•Highpuritygold0.9999.Beyond4ninesismeaningless.•Madeusingthehighestpurity,sterilereagentgradedeionizedwater.•Concentration:10ppm(minimum)ofgoldparticle