二元混合溶劑體系中制備金屬硫化物的低維納米結(jié)構(gòu).pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文二元混合溶劑體系中制備金屬硫化物的低維納米結(jié)構(gòu)姓名：徐丹申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：無機(jī)化學(xué)指導(dǎo)教師：錢逸泰20060401中國科學(xué)技術(shù)人學(xué)壩I。學(xué)位沈文AbstractThisdissertationalmstoestablishsolution—basedchemicalsyntheticmethodsofmixedsolventsasreactionmediumtopreparelowdimensional

2、nanostructuresofsemiconductingmetalsulfidesVariouslow—dimensionalnanostrncturesofsulfidesweresynthesizedinthereactionsystemofmixedsolventscomposedwithdodecanethiolandavarietyofsolventsTheinfluencesofsomekeysyntheticparam

3、etersonthemorphologiesanddimensionsofthefinalproductshavebeensystemicallyinvestigatedThemainpointsaresummarizedasfuIlows：1HighqualitynanowiresofCdShavingauniformlateraldimensionandconsiderablelengthweresynthesizedbytheso

4、lvothermalreactioninthemixedsolventofethylenediamineanddodecanethi01ApossiblegrowthmechanismofCdSnanowireswasproposedOurexperimentalresultsofTEMobservationsandXRDanalysesmanifestformationprocessofCdSnanowiresthatinvolved

5、infourprocesses：(1)theformationofsphericalparticlesthroughaseriesofsolvothermalreactionsbetweenCd(OAc)2，C12H25SH，andNaS2CNEt2，(2)thegrowthofthinnanowhiskersofCdSonthesurfacesofthesphericalparticles，resultingintheformatio

6、nofclew—likeparticles(3)thefurthergroW廿hofnanorodsbasedonnanowhiskersandthesubsequentruptureofclew—likeparticlesintopolydispersednanorods，and(4)theevolutionoflongnanowiresTheformerthreestagesCanberegardedasatransformatio

7、nprocessfromCd(SCj2H2s)2toCd(S2CNEt2)2，andfinallytoCdS，namelyasolid—solidtransformationprocess；whilethefqurthstageisatypicalOstwaldripeningprocessTheresultsofourphotoluminescenceandUVvisspectroscopymeasurementsrevealedth

8、attheresultantCdSnanowiresshowaquantumconfinementeffect2Bi2S3nanowiresandtheirassembledstructures，PbSnanocubes，andCdSmierospheresweresynthesizedinmixedsolventsofdodecanethiolandoilacidOurexperimentalresultsrevealedthatth