| 电泳和电镀法增强碳纳米管场发射特性的研究 |
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| 引用本文： | 陈雷锋,蒋红,宋航,赵海峰,李志明,黎大兵,郭万国,曹连振,刘霞. 电泳和电镀法增强碳纳米管场发射特性的研究[J]. 真空科学与技术学报, 2010, 30(1). DOI: 10.3969/j.issn.1672-7126.2010.01.13 |
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| 作者姓名： | 陈雷锋 蒋红 宋航 赵海峰 李志明 黎大兵 郭万国 曹连振 刘霞 |
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| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所中国科学院激发态物理重点实验室,长春,130033;中国科学院研究生院,北京,100039
2. 中国科学院长春光学精密机械与物理研究所中国科学院激发态物理重点实验室,长春,130033 |
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| 摘 要： | 碳纳米管(CNT)和衬底的电学接触问题是获得高性能CNT电子器件的一个关键性的问题。本文采用电泳电镀方法制备CNT冷阴极,有效改善了CNT与衬底间接触电阻,增强了碳纳米管场发射性能。电泳电镀法制备的碳纳米管冷阴极场发射的开启电场(电流密度为10μA.cm-2时的电场)由2.95 V.μm-1降低到1.0V.μm-1,在电场为8V.μm-1时电流密度由0.224增加到0.8112mA.cm-2。在电流密度为800μA.cm-2时进行1h的场发射稳定性测试,结果表明,电泳电镀法所得CNT场发射电子源电流密度几乎不变,而且电流密度比较稳定;而只有电泳的方法获得的CNT场发射电子源电流密度波动较大,电流不稳定且呈较快的衰减趋势,1h后减少到原来的75%。采用电泳电镀方法制备CNT阴极,CNT的根部被纳米银颗粒覆盖和包裹,使CNT与衬底接触更加牢固而紧密,又由于银具有很好的导电性,从而大大减小了接触电阻,因此电泳电镀法能大大改善CNT与衬底的电学接触性能。
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| 关 键 词： | 碳纳米管 场发射 电泳 电镀 纳米银颗粒 接触电阻 |
Field Emission Enhancement of Carbon Nanotubes Assembled by Electrophoresis and Successive Electroplating |
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| Chen Leifeng,Jiang Hong,Song Hang,Zhao Haifeng,Li Zhiming,Li Dabing,Guo Wanguo,Cao lianzhen,Liu Xia. Field Emission Enhancement of Carbon Nanotubes Assembled by Electrophoresis and Successive Electroplating[J]. JOurnal of Vacuum Science and Technology, 2010, 30(1). DOI: 10.3969/j.issn.1672-7126.2010.01.13 |
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| Authors: | Chen Leifeng Jiang Hong Song Hang Zhao Haifeng Li Zhiming Li Dabing Guo Wanguo Cao lianzhen Liu Xia |
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| Affiliation: | Chen Leifeng1,2,Jiang Hong1*,Song Hang1,Zhao Haifeng1,Li Zhiming1,Li Dabing1,Guo Wanguo1,Cao lianzhen1,Liu Xia1,2(1.Key Laboratory of Excited State Processes,Changchun Institute of Optics,Fine Mechanics , Physics,Chang Chun 130033,China,2.Graduate school of the Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | A novel technique was successfully developed to assemble carbon nanotubes(CNTs),coated with Ag nano-particles,on glass substrate by a combination of electrophoresis and successive electroplating.The microstructures of the CNTs emitter assembly were characterized with scanning elctron microscopy(SEM) and energy dispersive spectroscopy(EDS).The influence of the two emitter fabrication techniques on field emission characteristics was studied.The results show that newly-developed technique considerably improves... |
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| Keywords: | Carbon nanotubes Field emission Electrophoresis Electroplating Ag-nanoparticals Contact resistance |
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