过渡金属掺杂的硫化锌纳米材料的制备及性质研究

《过渡金属掺杂的硫化锌纳米材料的制备及性质研究》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、[．2003421丐——研究类犁壁塑⑩煦』匕Z。芗．：§驴髯§亳。％j蘸嗨§《’瓷硕士学位论文学科门类学科专业指导教师》篱《蘸黪遵簖§*“辫

2、雾§霆◇熬i璺羲工学应用化学张卫华教授研究生——论文题目胡鹤过渡金属掺杂的硫化锌纳米材料的制备及性质研究答辩日期：二oo六年五月二十七日活性剂聚乙烯基吡咯烷酮(PVP)和聚乙烯醇(PVA)中，硫化锌纳米晶包覆二氧化硅的效果；试验方案二：加热条件下以硫代乙酰胺为硫源，无水乙醇／水混相中反应，讨论了不同硫代乙酰胺和Zn“量的情况下，硫化锌纳米晶包覆二氧化硅的效果。试验结果表明方案二较为成功，然后以氢氟酸蚀刻二氧化硅模扳，

3、能得到蚀刻量可控的半中空和中空型纳米球。关键词：荧光硫化锌纳米晶核壳结构空腔结构nAbstractThesynthesisandstIldyofnano—stnlcturedmaterialshaVebecomeamajorinterdiscipliIlaryareaofrcsearchoVerthepast20years．SemiconductornanopanidesplayamajormleinseVeralnewtechnologies，theintenseinterestiIlthisareaderiVesfrommeiruniquechemic

4、al，physicalandelectronicpropenies，whichgiVetheirpotentialuseinthefieldsofdisplays，lighting，sensorsandlasers，biologictechn0109yafldmedicaltecllflology，aswcⅡasotherareas．naIlsitionmetaIionsor／觚dmre。eanIlmetaliOnsdOpedZnSnanopartides，includingnanometerpowdersandmreedimensioncore—shel

5、lnanospheresandhollOwnanospheres，whichisoneofthemostpopulartoPicsofsemi∞nductorcompound．T1lenanometermeorythephenomena0fl哪inescenceandrelatedmechanism，thememods0fprepamtionofdopedzrISnanopartides，thepotentialapplicatiOnandmethodsofpreparationofmreedimensioncore—she】】nanospheresand

6、ho】10wnanospheresaboutII-Ⅵsemiconductorcompound，whatareallreviewedin山isthesisdetail．TheexperimemsOfthisthesisindudetwopansasfolI刚Fing：PaTtIPTeparationandPhot01啪inescencePfopertiesofznSNanocrys诅lsCo．doDedwithMn2+andPb2+TheaTrestedchemicalprecip“ationmethodisthemostpopulartechniquem

7、atisusedinindustrialapplicationsbecauseofitsche印rawmaterials，easyhandingandlarge—scaleproduction，manydopedznSnanoparticleswerepreparedbythismethod．Inordert0Volume·pmducehomodispersefree—standing，wim900dsurfacestates，andhighluminescentdopedZnSnanoparticles，polymerPVPwasusedassurfac

8、tant．NanocrystallineZnS：Mn2+andZnS：Mn2+'Pb“hasbeenpreparedviatheprccipitationmethodatmomtemperatureandunder咖bientconditions．thecrystallinepanidescxhibitazinc-blendecrystalsstructIlreandtheaveragesizeisabout2～4nm．meZnS：Mn2+nanocrystalsemissibnpeakat583nmasthemoIeratiOsofMn2+reladve

9、t0zIl2+is3％，TheemissionspectraofM