氧化锌纳米棒场发射性能研究

3­(,100083)(200637;2006331),,ZnO,ZnO.ZnO,ZnO,.,ZnO,,.,.:,,PACC:6146,7970,6150J3(:50502005)(:1062008).­.E-mail:[e-mail]11,.,:,,.Ijima[1],[24].,,.(1975),,,.,,ZnO[5,6][7][8][9],ZnO.ZnO,ZnO.,ZnO,ZnO,.,ZnO,,,.21:(4N).ZnO,2nm,5mm,ZnO8mm..,10Pmin500.200cm3PminAr,1101325105Pa,3h.,.5510200610100023290P2006P55(10)P5409204ACTAPHYSICASINICAVol.55,No.10,October,2006n2006Chin.Phys.Soc.31(SEM),1(a)1(b)ZnOSEM,400nm.10-7Pa.ZnO,,5kV.2(a)(J)(E).J10APcm2(Eton),1mAPcm2(Ethr).EtonEthrd3(a).1(a)(b)ZnOSEM2ZnO(a)E-J(b)F-N(ZnO,ZnO)Fowler2Nordheim(F2N)[10]:J=AE2locexp-B3P2Eloc,(1)A=115610-6,B=6183107,J(APcm2),(eV),Eloc(VPcm),E:Eloc=E=Vd,(2)V,d.J=115610-62E2exp-6.831073P2E,(3)lnJE2=-6.831073P2E+offset,(4)ZnOF2N,ln(JPE2)(1PE),SS=-6.831073P2P,(5)2(b)ZnOF2N,,ZnO014555F2N.ZnO513eVZnO,(5)ZnO(3(b)).3(a)ZnOEtonEthrd;(b)d3,,ZnOZnO(3(a)),ZnOZnO(3(b)),ZnOZnO.:1)ZnO.ZnO,,,ZnO.ZnO,,ZnO.2)ZnOZnO.,[11].(HRTEM)ZnO,(4),,,.,ZnO,,,ZnOZnO.,..5ZnO,,4ZnOHRTEM5ZnO,.,ZnO.,ZnO.ZnO,114510:ZnO.ZnO,.,ZnO.41ZnO,.,ZnO,ZnO.ZnO,ZnO,.,ZnO,,,.ZnO,.,,![1]IijimaS1991Nature35456[2]DekkerC1999Phys.Today5222[3]ChenL,ZhangGM,ChenXX,WangMS,ZhangQF,2005Chin.Phys.14181[4]LiuXH,ZhuCC,ZengFGetal2006ActaPhys.Sin.552830(inChinese)[2006552830][5]LeeCJ,LeeTJ,LyuSC,ZhangY,RuhH,LeeHJ2002Appl.Phys.Lett.813648[6]ZhaoQ,ZhangHZ,ZhuYW,FengSQ,SunXC,XuJ,YuDP2005Appl.Phys.Lett86203115[7]JoSH,BanerjeeD,RenZF2004Appl.Phys.Lett.851407[8]BanerjeeD,JoSH,RenZF2004Adv.Mater.162028[9]XuCX,SunXW,ChenBJ2004Appl.Phys.Lett.841540[10]FowlerRH,NordheimLW1928Proc.R.Soc.LondonSer.A119173[11]RihonN1978SurfaceScience7092FieldemissionfromZnOnanorods3NiSai2LiChangYong2Qin­LongYiYeRong2Chang(SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,China)(Received7March2006;revisedmanuscriptreceived31March2006)AbstractThefieldemissionpropertiesoftherandomlyorientedandthewell2alignedZnOnanorodssynthesizedbyathermalevaporationmethodwereinvestigatedindetail.Itwasfoundthatthefieldemissionofthewell2alignedZnOnanorodsisseriouslyaffectedbythescreeningeffect.While,comparedwiththeZnOarrays,thefieldemissionmeasurementsontherandomlyorientedZnOnanorodsshowalowerturn2onfiledandalargerfieldenhancementfactor,whichareattributedtotheweakscreeningeffectandthesurfaceperturbations.ThesefeaturesmaketherandomZnOnanorodsasacompetitivecandidateforfieldemissionflatpaneldisplay.Keywords:ZnO,fieldemission,randomPACC:6146,7970,6150J3ProjectsupportedbytheNationalNaturalScienceFoundationofChina(GrantNo.50502005)andtheNaturalScienceFoundationofBeijing,China(GrantNo11062008).­Correspondingauthor.E-mail:[e-mail]214555