ZnxCd1-xS纳米线的可控合成及其可调的光学性质.pdf

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1、物理化学学~E(WuliHuaxueXuebao)576ActaP．一Chim．Sin．2014，30(3)，576-582March[Article]doi：10．3866／PKU．WHXB201312232www．whxb．pku．edu．cnZnxCd，_xS纳米线的可控合成及其可调的光学性质林旭锋’席燕燕。，林德莲。(中国石油大学(华东)重质油国家重点实验室，山东青岛266580；中国石油大学(华东)理学院，山东青岛266580；中国石油大学(华东)化工学院，山东青岛266580)摘要：采用简单的气相沉积法，合成了不同组成的ZnCd—S

2、(0

3、迁的频率可随着组成的调节而调节，纳米线的禁带宽度介于ZnS(3．63eV)和CdS(2．41eV)的禁带宽度之间．关键词：锌．镉．硫：纳米线：气相沉积法：组成可调：光学性质可调中图分类号：0649．4ControllableSynthesisofZnxCdl—xSNanowireswithTunableOpticalPropertiesLINXu—Feng’一XIYan—Yan’l。’LINDe-Lian’1。(StateKeyLaboratoryofHeavyOilProcessing,ChinaUniversityofPetroleum(E

4、astChina)，Qingdao266580,ShandongProvinceR．China；。CollegeofScience,ChinaUniversityofPetroleum(EastChina)，Qingdao26658&ShandongProvince。R．China；CollegeofChemicalEngineering,ChinaUniversityofPetroleum(EastChina)，Qingdao266580,ShandongProvince,R．China、Abstract：ZnxCd1一f0

5、wireswithseveraldiferentcompositionsweresuccessfulysynthesizedonSiwafersbyasimplevapordepositionmethodusingAuasacatalyst．Themorphologyandcompositionofthenanowireswereinvestigatedbyscanningelectronmicroscopy，transmissionelectronmicroscopy，andenergydispersiveX-rayspectroscopy．

6、TheresultsshowthattheZn／Cdratioiscontrollablebyadjustingtherelativeamountofthestartingmaterialsandthedepositionlemperature．TheX．raydiffractionpatternsshowthatthenanowiresaresinglecrystalswiththewurtzitestructure．Themorphologycharacterofthenanowiressuggeststhatthegrowthofthen

7、anowirescanbeexplainedbythebase—growthmechanism．TheopticalcharacterislicsofthenanowireswerestudiedbyRamanandphotoluminescence(PL)spectroscopy．Ramanshiftsofthelongitudinaloptical(LO)phononmodewereobsewedintheZnCdSnanowires．TheLOpeakfrequencychangedsmoothlywithchangingcomposit

8、ion，whichapproximatelyshowsaone．modebehaviorpatternintheZnCd1一Snanowires．In