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1、ElectrochimicaActa93(2013)80–86ContentslistsavailableatSciVerseScienceDirectElectrochimicaActajournalhomepage:www.elsevier.com/locate/electactaPhotoconductive,free-standingcrystallizedTiO2nanotubemembranesGuohuaaabba,∗aLiu,NilsHoivik,XiaomingWang,ShushenLu,KaiyingWang,HenrikJakob
2、senaDepartmentofMicroandNanoSystemsTechnology,VestfoldUniversityCollege–HiVe,Horten3184,NorwaybSchoolofChemistryandChemicalEngineering,SunYat-SenUniversity,Guangzhou510275,ChinaarticleinfoabstractArticlehistory:Wereportcontrollablefabricationandphotoconductivepropertiesoffree-sta
3、ndingcrystallizedTiO2Received2January2013nanotube(TNT)membranes.TheTNTmembranesaresynthesizedbyatwo-stepanodicprocedure,inAccepted23January2013whichdependenceoftheTNTmorphologyanddetachmentontheappliedvoltageisexperimentallyAvailableonline31January2013present.Duetothelargesurface
4、area-to-volumeratioandhighqualitycrystalstructure,themembraneexhibitsasensitivespectralresponsetotheultraviolet(UV)light.Thespectralresponseat320nmKeywords:isAnodization∼30A/Wunder5.0Vbias,correspondingtoexternalquantumefficiencyof10,695%.Thephotore-sponseTiOnanotubeoriginsfromint
5、ernalgaininducedbydesorptionofoxygenmoleculesfromthenanotubesurfaces2andFree-standingreductionofthebarrieratneighboringtubesunderUVillumination.ThisworkextractsintrinsicphotoconductivepropertiesofTNTmembranesandisbeneficialtothefuturedesignofoptoelectronicPhotoconductivemembranesd
6、evices.©2013ElsevierLtd.Allrightsreserved.1.Introductiondrugreleaseplatformetc.[27].ThewavelengthselectivityanddistinctivephotoelectricpropertiesmakeTiO2areverysuitableThestudyofnanostructuredphotoconductivematerialsisanforUVdetection/photo-voltaicconversion[28–30].Traditionally,
7、emergingtopicduetotheiruniquephotoelectricpropertiesandtherearemanywaystointegratetheparticleorporousTiO2potentialapplicationsinoptoelectronicdevices[1,2].Researchlayerintonanoelectronicdevices.Mostofstudiesareperformedofthephotoconductivematerialshavehistoricallybeenfocusedonnan
8、ogranularfilms[30],nanotubeswithelectroly
