多孔阳极氧化铝模板与磁性纳米线2f管的制备与分析

《多孔阳极氧化铝模板与磁性纳米线2f管的制备与分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、山西师范大学学位论文electrolyteislessthan30nm．Whenoxalicacidusedaselectrolyte，andtheoxidationvoltageis30-80V，wecanobtainAAOtemplateswithdiameterofseveraltensnanometers．WhenphosphoricacidI-Jt，useda鬟Ol'酏troIyte，andtheoxidationvoltageis100-200V，wecanobtainAAOtemplateswithdiameterofseveralhundrednano

2、meters-Nomatterwhatkindsofacidusedastheelectrolytewecanhavethefollowingruleswithinacertainrange：thediameterofAAOtemplatesincreaseswithincreasingoxidationvoltageandporewideningtime-Byextendingthesecondaryoxidationtimewecanincreasethethicknessofthetemplate．Throughaseriesofexperiments，weha

3、vegotsomeexperimentalconditionsforthepreparationofatemplatewithspecificsize，whichcanbeusedforthenextpreparationofone-dimensionalnanomaterials．(2)AseriesofFenanowirearrayswerepreparedbyelectrochemicaldepositionmethodinthethroughholetemplates-Wehadstudiedtheimpactofporediametersizeandoxid

4、ationvoltageonFenanowire’morphologyandmagneticproperties．TheresultsshowthattheFenanowiresarepolycrystalwith(111)and(211)diffractionpeaks，andthediameterofthenanowiresisconsistentwiththeporediameteroftheAAOtemplates．Thecoercivityishigherwhenthefieldisappliedparalleltotheaxisofthenanowires

5、thanthatwhenthefieldisperpendiculartotheaxis．Inaddition，thenanowiresaspe(÷tratio2decreaseswiththeincreaseofthetemplatediameter，whichwⅢdec怆a∞theshapeanisotropy．Therefore，thecoercivityand阳manen∞decreaseaccordingly．Bothlengthandmorphologyofthenanowiresarestronglyinfluencedbytheoxidationvol

6、tage．Whentheoxidationvoltageis-1·1V，Fenanowiresshowaverysmoothsu哟ceandIonglength，andhaveamaximumcoercivity．Consequently，themagneticpropertyofnanowiresisstronglyinflencednotonlybytheaspectratiobutalsobythemorphology．(3)NinanowiresandnanotubeswereobtainedbyeIectrochemicaIdepositionmethod-

7、TheresultsshowthatNinanowireshaveave口。≯smoothsurfaceandlargeaspectratio．Thecoercivityishigherwhenthefieldisappliedparalleltotheaxisofthenanowiresthanthatwhenthefieldisperpendiculartotheaxis．TheNinanotubeshavesmoothouterwall,thintubewallanduniformwallthickness．Thecoercivityinthe