ZnO納米晶須的分維維數(shù)及其發(fā)光性能.pdf

1、武漢科技大學(xué)碩士學(xué)位論文ZnO納米晶須的分維維數(shù)及其發(fā)光性能姓名：楊英歌申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：吳潤20030520ABSTRACTThemorphologyofZnonanowhiskerswasdemonstratedwithobviousfactalcharacteristics，whichplayaroleindeterminationoftheproperties，Zn0nanowhiskerssynlhesi

2、zedbyoxidizingZnvaporatlowpressurcshowdifrcrentmorphologyinthisstudyAccordingtofhctaIdimensiontheorv’fractaIdimensioncalculationprogram(FDCP)hasbeendevelopedtocalculatethefactaldimensionsofZn0nanowhiskers0nthebasisoforth

3、ogonaltest，theoptimumprocedureparameterswercdetemlinedItisevaporatingtemperatureof750℃、reactionprcssureor4000paand02contentof50％TheevaporatingtemperatureaIldreactionpressurearekeypmcedureparametersTheformerisrelatedwithf

4、iactaldimension，asFD=一4E—05T2O0647T一23872andtherelationbetweenreactionpressureandfiactaldimensioncanbedescribedbvthe如nctionofFD=5E09P26E05P15897AlsothefractaldimensionsandBETsurf如eareacanbedescribedbythefunctionofy=0Ol82

5、P3847hInthegraphoftheirporesizedistribution，poresizew11ereporeVoIumeismaximaIbecomessmaIlerandsmaIlerw“htheincreasingoffracCaldimensionsTheUVemissionofZnOnanoDaniclescanbeattributedtothefreeexcitonemissionat380nmTheinten

6、sityofUVemissionisgreatlyinfluenc司bvcrysIalstructureThesampleofWD3whichisoptimumprocessdecidedbyorlhogonaltestexhbiIsfinephoColuminescenceThePhotoluminescence、vasnotfoundinthesamplesofYLlandBL3whichare2000paof50％02and50％