液相法制备取向ZnO纳米线阵列的场发射特性.pdf

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1、物理化学学报(WuliHuaxueXuebao)SeptemberActaPhys．一Chim．Sin．，2010，26(9)：2563—25682563【Article】www．whxb．pku．eduan．液相法制备取向ZnO纳米线阵列的场发射特性张欢李梦轲”张竞于丽媛刘玲玲杨志z(辽宁师范大学物理与电子技术学院，辽宁大连116029；上海交通大学微纳科学技术研究院，微米／纳米加工技术国家级重点实验室，薄膜与微细技术教育部重点实验室，上海200240)摘要：采用水热合成工艺，在不同条件下制备了不同的一维取向Zn

2、O纳米线阵列样品．用x射线衍射仪(XRD)、扫描电镜(SEM)J~透射电镜(TEM)对样品的晶体结构和形貌等进行了表征，对样品的场发射特性进行了分析和比较，并用Fowler-Nordheim方程对影响ZnO纳米线场发射的因素进行了研究．结果表明，具有较低生长密度分布、较高的长径比和较尖锐生长端的ZnO纳米线阵列样品具有较好的场发射特性．关键词：ZnO；纳米线阵列；场发射；液相法中图分类号：0649FieldEmissionPropertiesofAlignedZnONanowireArraysPreparedbyS

3、impleSolution-PhaseMethodZHANGHuanLIMeng—Ke·ZHANGJingYULi—YuanLIULing—LingYANGZhi。SchoolofPhsicsandElectronicTechnology．LiaoningNormalUniversity,Dalian116029,LiaoningProvince．P．R．China；2NationalKeyLaboratoryofNano／MicroFabricationTechnology,KeyLaboratoryforThi

4、nFizmandMicrofabricationoftheMinistryofEducation，ResearchInstituteofMicro／NanoScienceandTechnology,ShanghaiJiaoTongUniversity,Shanghai200240,P．R．China)Abstract：One—dimensional(1D)alignedZnOnanowirearrayswit}ldifferentmorphologiesweresynthesizedbyasolution．phas

5、emethod．ThemorphologyandmicrostructureoftheproductswerecharacterizedbyX—raydiffraction(XRD)．scanningelectronmicroscopy(SEM)．andtransmissionelectronmicroscopy(TEM)．ThefieldemissionpropertyofdifferentZnOnanowirearraysampleswascompared．Thefactorsthatinfluencethef

6、ieldemissionpropertyoftheIDZnOnanowirearrayswereanalyzedusingtheFowler-Nordheimequation．TheresultsshowedthattheZnOnanowiresampleswimthe1owerarealdensity．higheraspectratio．andthintipsshowedmuchbetterfieldemissioncharacteristics．KeyWords：ZnO；Nanowirearray；Fielde

7、mission；Solution—phasemethodHigh—qualityfieldemittersareverydesirableforapplicationsgoodcandidateforfieldemissionapplications．Recently，theinawiderangeoffield．emission—baseddevicessuchasflat—pan．丘eldemissionpropertyofdiferent1DZnOnanostructures．sucheldisplaysan

8、dotherelectronicdevices．1DZnOsemiconductorasnanowires，nanoneedles，nanopins，andnanotubeshasbeennanostructureswithitsinherentpropertiesoflargerlength-to--di·-studiedt1-5]．Theprevious