摘要
采用水热法制备形貌和尺寸各异的纳米ZnO材料。用X射线衍射分析仪(XRD)和扫描电子显微镜(SEM)测试产物结构和表面形貌,分析影响纳米ZnO材料生长的因素,探讨纳米ZnO的生长机理。研究了各种形貌ZnO阵列的场致发射特性。实验结果表明,在各种ZnO纳米结构中,纳米管的场致发射性能最好,其最大电流密度可达到0.2mA/cm2,开启场强2.5V/μm,为寻求良好场发射性能的ZnO纳米材料提供了一个可行的途径。
A variety of morphologies and dimension of ZnO nanomaterial was synthesized using hydrothermal methods.The structure and morphologies of ZnO products were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM） respectively.The impact of the growth of ZnO material factors was analyzed and the mechanism of growth was discussed too.The characteristics of field emission for a variety of morphologies ZnO array were studied.The experimental results show that field emission performance of nano-tube ZnO was the best in all of various structure of ZnO nanomaterial.The maximum current density reached 0.2mA/cm2 and its turn-on field was 2.5V/μm.The results provide a feasible method for improving field emission properties of ZnO nanomaterial.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第2期288-291,共4页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)平板显示重大专项资助项目(2008AA03A313)
福建省科技重大专项资助项目(2004HZ01-2)
福建省科技三项经费资助项目(2006F5061)
福建省教育厅资助重点项目(JA09003)
关键词
ZNO纳米材料
水热法
表面形貌
场发射性能
ZnO nanomaterial
hydrothermal method
surface morphology
field emission performance
