不同环境湿度对CuO纳米线生长及场发射性能的影响

doi:10.3724/SP.J.1077.2013.13100

无机材料学报 ›› 2013, Vol. 28 ›› Issue (12): 1359-1363.DOI: 10.3724/SP.J.1077.2013.13100 CSTR: 32189.14.SP.J.1077.2013.13100

不同环境湿度对CuO纳米线生长及场发射性能的影响

叶芸, 陈填源, 蔡寿金, 颜敏, 刘玉会, 郭太良

(福州大学物理与信息工程学院, 福州350002)

收稿日期:2013-02-27 修回日期:2013-06-03 出版日期:2013-12-20 网络出版日期:2013-11-15
基金资助:
国家863重大专项(2013AA060301); 国家自然科学基金(61106053); 教育部博士点博导基金(20103514110007)

Effects of Different Humidity on the Growth and Field Emission Properties of CuO Nanowires

YE Yun, CHEN Tian-Yuan, CAI Shou-Jin, YAN Min, LIU Yu-Hui, GUO Tai-Liang

(College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China)

Received:2013-02-27 Revised:2013-06-03 Published:2013-12-20 Online:2013-11-15
Supported by:
National High Technology Research and Development Program of China (863 Program) (2013AA060301); National Natural Science Foundation of China (61106053); Specialized Research Fund for the Doctoral Program of Higher Education of China (20103514110007)

摘要/Abstract

摘要： 首先在400℃的干燥空气(流量为500?sccm)及不同水汽流量(500、1500、3000、4000 sccm)等条件下分别热氧化铜片获得了系列垂直生长的氧化铜纳米线, 随后, 采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)研究了不同条件下所制备的氧化铜纳米线形貌、结构等性能, 并进一步研究了其场发射性能。研究结果表明: 水汽对氧化铜纳米线的密度及场发射性能影响较大, 在500 sccm空气流量条件下, 通入水汽(500 sccm)条件与未通入水汽条件生长得到的氧化铜纳米线相比, 其密度明显增大, 场发射性能提升, 其开启场强约为3.7 V/μm, 明显低于干燥空气中生长氧化铜纳米线的开启场强(6.5 V/μm); 此外, 制备得到的氧化铜纳米线的场发射性能随着通入水汽量增大出现先升高后降低的趋势, 并且, 在通入水汽流量为3000 sccm时, 获得最佳的氧化铜纳米线场发射性能, 其开启场强低至1.4 V/μm。

关键词: CuO纳米线, 热氧化法, 环境湿度, 场发射

Abstract: Various kinds of vertical CuO nanowires on the Cu substrate were prepared by thermal oxidation method at 400℃ in 500 sccm air with different flow of water vapour (0, 500, 1500, 3000 and 4000 sccm). The morphology and structure charcateristics of as prepared CuO nanowires were further investigated by Scanning Electron Microscope (SEM), Field Emission Transmission Electron Microscope (FE-TEM) and X-ray Diffraction (XRD), respectively, and their field emission properties were also explored. The results show that both the density of as-obtained CuO nanowires and their field emission performance including turn-on field are greatly influenced by the water vapour. The CuO nanowires prepared under the water vapour (500 sccm) exibit higher density and better field emission performance than those obtained only in dry air condition (500 sccm). The turn-on field of the former is 3.7 V/μm, obviously lower than those of the latter (6.5 V/μm). Additionally, the field emission performance of as prepared CuO nanowires improves with the increase of water vapour flow in the preparation at first, reaches the extreme value at 3000 sccm, and then turns down. The best field emission performance of CuO nanowires is obtained in 3000 sccm water vapour where the lowest turn-on field is about 1.4 V/μm.

Key words: CuO nanowires, thermal oxidation, environment humidity, field emission

中图分类号:

TB383
O462

叶芸, 陈填源, 蔡寿金, 颜敏, 刘玉会, 郭太良. 不同环境湿度对CuO纳米线生长及场发射性能的影响[J]. 无机材料学报, 2013, 28(12): 1359-1363.

YE Yun, CHEN Tian-Yuan, CAI Shou-Jin, YAN Min, LIU Yu-Hui, GUO Tai-Liang. Effects of Different Humidity on the Growth and Field Emission Properties of CuO Nanowires[J]. Journal of Inorganic Materials, 2013, 28(12): 1359-1363.

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不同环境湿度对CuO纳米线生长及场发射性能的影响

Effects of Different Humidity on the Growth and Field Emission Properties of CuO Nanowires

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