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Vol.29 Suppl.2 倪赛力等：影响氧化锌纳米材料场发射性能的因素 .125. [5]Jie JS.Wang GZ,Chen Y M.et al.Synthesis and optical prop- [11]Wang R C.Liu C P,Huang J L,et al.ZnO nanopencils:Effi- erties of well-aligned ZnO nanorod array on an undoped Zno film. cient field emitters.Appl Phys Lett.2005.87:013110 Appl Phy Lett.2005.86:031909 [12]Li Q H.Wan Q,Chen Y J,et al.Stable field emission from te- [6]Seung Y B.Hee WS,Hyun C C,et al.Heterostructures of Zno trapod like ZnO nanostructures.Appl Phys Lett.2004.85: nanorods with various onedimensional nanostructures.J Phys 636 Chem B,2004,108:12318 [13]Fowler R H.Nordheim L W.Electron emission in intense elec- [7]Wu P,Saraf G.Lu Y C.et al.Ion-beam-induced sharpening of tric fields.Proc Roy Soc Lond Ser A.1928.119:173 ZnO nanotips.Appl Phys Lett.2004.85:1247 [14]Edgcombe C J.Valdre U.Experimental and computational [8]Govender K DS.Brien P O.Room temperature lasing observed study of field emission characteristics from amorphous carbon from ZnO nanocolumns grown by aqueous solution deposition. single nanotips grown by carbon contamination I.Experiments Adv Mater,2002,14:1221 and computation.Philos Mag B.2002.82:987 [9]Li Y.Meng D W,Zhang L D.et al.Ordered semiconductor ZnO [15]Collins P G.Zettle A.Unique characteristics of cold cathode nanowire arrays and their photoluminescence properties.Appl carbon nanotube matrix field emitters.Phys Rev B.1997.55: Phys Lett,.2000,76:2011 9391 [10]Lee C Y,Tseng T Y.LiS Y,et al.Electrical characterizations [16]Zhang H Z.Zhu Y W.Wang R M.Effect of adsorbates on of a controllable field emission triode based on low temperature fieldelectron emission from Zn0 nanoneedle arrays.J Appl synthesized ZnO nanowires.Nanotechnology.2006.17:83 Phys,2004,96,624 Field emission from well-aligned ZnO nanorods NI Saili,CHANG Yongqin),CHEN Xihong2),ZHANG Yinhu),DUO Yongzheng,QIANG Wen- jiang,LONG Yi) 1)Materials Science and Engineering School.University of Science and Technology Beijing.Beijing 100083.China 2)Department of Physics.Peking University.Beijing 100871.China ABSTRACI Well-aligned zinc oxide nanorods with different morphologies were fabricated on silicon substrates via a simple thermal evaporation method.The field emission measurements of these ZnO arrays show that the e- mission instability was mainly caused by the non uniformity of emission tips in the arrays.DC ageing process was adopted and found that it was an effective way to improve the emission stability.The morphology of ZnO arrays has also effected obviously on the field emission property,and the optimized morphology exhibits better field emission property. KEY WORDS ZnO arrays;field emission;morphology;stability［5］ Jie J SWang G ZChen Y Met al．Synthesis and optical properties of wel-l aligned ZnO nanorod array on an undoped ZnO film． Appl Phy Lett200586：031909 ［6］ Seung Y BHee W SHyun C Cet al．Heterostructures of ZnO nanorods with various one-dimensional nanostructures．J Phys Chem B2004108：12318 ［7］ Wu PSaraf GLu Y Cet al．Ion-beam-induced sharpening of ZnO nanotips．Appl Phys Lett200485：1247 ［8］ Govender K D SBrien P O．Room-temperature lasing observed from ZnO nanocolumns grown by aqueous solution deposition． Adv Mater200214：1221 ［9］ Li YMeng D WZhang L Det al．Ordered semiconductor ZnO nanowire arrays and their photoluminescence properties．Appl Phys Lett200076：2011 ［10］ Lee C YTseng T YLi S Yet al．Electrical characterizations of a controllable field emission triode based on low temperature synthesized ZnO nanowires．Nanotechnology200617：83 ［11］ Wang R CLiu C PHuang J Let al．ZnO nanopencils：Efficient field emitters．Appl Phys Lett200587：013110 ［12］ Li Q HWan QChen Y Jet al．Stable field emission from tetrapod-like ZnO nanostructures．Appl Phys Lett200485： 636 ［13］ Fowler R HNordheim L W．Electron emission in intense electric fields．Proc Roy Soc Lond Ser A1928119：173 ［14］ Edgcombe C JValdre U．Experimental and computational study of field emission characteristics from amorphous carbon single nanotips grown by carbon contamination Ⅰ．Experiments and computation．Philos Mag B200282：987 ［15］ Collins P GZettle A．Unique characteristics of cold cathode carbon-nanotube-matrix field emitters．Phys Rev B199755： 9391 ［16］ Zhang H ZZhu Y WWang R M．Effect of adsorbates on field-electron emission from ZnO nanoneedle arrays．J Appl Phys200496：624 Field emission from wel-l aligned ZnO nanorods NI Saili 1）CHA NG Yongqin 1）CHEN Xihong 2）ZHA NG Y inhu 1）DUO Yongz heng 1）QIA NG Wenjiang 1）LONG Y i 1） 1） Materials Science and Engineering SchoolUniversity of Science and Technology BeijingBeijing100083China 2） Department of PhysicsPeking UniversityBeijing100871China ABSTRACT Wel-l aligned zinc oxide nanorods with different morphologies were fabricated on silicon substrates via a simple thermal evaporation method．The field emission measurements of these ZnO arrays show that the emission instability was mainly caused by the non-uniformity of emission tips in the arrays．DC ageing process was adopted and found that it was an effective way to improve the emission stability．The morphology of ZnO arrays has also effected obviously on the field emission propertyand the optimized morphology exhibits better field emission property． KEY WORDS ZnO arrays；field emission；morphology；stability Vol．29Suppl．2 倪赛力等： 影响氧化锌纳米材料场发射性能的因素 ·125·