| 基于扫描电子显微镜的单根一维纳米材料原位场发射性能研究 |
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| 引用本文： | 刘钊,闫国庆,赖嘉霖,李成垚,肖竞,王胜,高旻.基于扫描电子显微镜的单根一维纳米材料原位场发射性能研究[J].北京大学学报(自然科学版),2011,47(3):459-465. |
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| 作者姓名： | 刘钊 闫国庆 赖嘉霖 李成垚 肖竞 王胜 高旻 |
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| 作者单位： | 教育部纳米器件物理与化学重点实验室,北京大学信息科学技术学院电子学系,北京,100871 |
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| 基金项目： | 国家自然科学基金(51072006,61001016)资助 |
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| 摘 要： | 基于扫描电子显微镜和纳米探针技术,展示了一维纳米材料原位场发射的测量方法和实例。实验以钨针尖为接收极,纳米材料为发射极,通过结合扫描电子显微镜的实时成像功能,纳米探针的精确操纵及电学测量技术以及激光辐照功能,系统研究了极间距离D、形貌变化、吸附气体和激光注入对单根多壁碳纳米管和氧化锌纳米线场发射性能的影响。结果表明,当D远小于纳米材料长度L的3倍时,D越小,开启场强和阈值场强越大,场发射性能越弱。此外,纳米线尖端曲率半径越大,场增强因子越小,场发射性能越弱。研究还发现O2的脱附和激光辐照有助于纳米材料场发射性能的提高。
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| 关 键 词： | 扫描电子显微镜 一维纳米材料 场发射性能 |
In-situ Field Emission Studies of Individual One-Dimensional Nanostructures Based on Scanning Electron Microscope |
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| LIU Zhao,YAN Guoqing,LAI Jialin,LI Chengyao,XIAO Jing,WANG Sheng,GAO Min.In-situ Field Emission Studies of Individual One-Dimensional Nanostructures Based on Scanning Electron Microscope[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2011,47(3):459-465. |
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| Authors: | LIU Zhao YAN Guoqing LAI Jialin LI Chengyao XIAO Jing WANG Sheng GAO Min |
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| Institution: | LIU Zhao,YAN Guoqing,LAI Jialin,LI Chengyao,XIAO Jing,WANG Sheng,GAO Min Key Laboratory for the Physics and Chemistry of Nanodevices(MOE),Department of Electronics,School of Electronics Engineering and Computer Science,Peking University,Beijing 100871 |
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| Abstract: | This paper reports on methods and examples of in-situ field emission measurements of individual one-dimensional nanostructures based on scanning electron microscope(SEM) and nanoprobe techniques.In the experimental setup,tungsten(W) tips and nanostructures acted as electron-receivers and emitters,respectively,based on which systematic studies of individual MWCNTs and ZnO nanowires were realized.By combining real-time imaging,nanoprobe technique for precise nanomanipulation and electric measurement,and light... |
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| Keywords: | scanning electron microscope one-dimensional nanostructures field emission property |
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