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磁场辅助热处理金属化碳纳米管场发射性能

叶芸 陈填源 郭太良 蒋亚东

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磁场辅助热处理金属化碳纳米管场发射性能

叶芸, 陈填源, 郭太良, 蒋亚东

Effect of magnetic field assisted heat-treatment on field emission properties of metalized multi-walled carbon nanotubes cathodes

Ye Yun, Chen Tian-Yuan, Guo Tai-Liang, Jiang Ya-Dong
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  • 利用化学镀方法对多壁碳纳米管(multi-walled carbon nanotubes,MWNTs)表面金属化镀镍(MWNTs/Ni),采用丝网印刷制备MWNTs/Ni场发射阴极,并在磁场辅助下热处理所得阴极,研究磁场辅助热处理对MWNTs/Ni阴极的场发射性能的影响. 经300 mT磁场辅助热处理的MWNTs/Ni的场发射阴极开启场强约为0.80 V-1,场增强因子 约为16068. 对单根MWNTs/Ni在磁场中的受力情况进行建模分析,实验结果表明:磁场辅助热处理有助于提高MWNTs/Ni在阴极表面的直立分布,提高了MWNTs/Ni的场发射性能.
    The effect of magnetic field assisted heat-treatment on the field emission properties of metalized multi-walled carbon nanotubes (MWNTs) is investigated. The metalized MWNTs are prepared via an electroless plating method, and then the MWNTs/Ni cathodes are fabricated by screen printing. The morphology and composition of MWNTs/Ni were studied by transmission electron microscopy and energy dispersive X-ray detector, and the difference between MWNTs/Ni cathodes heat-treated with or without magnetic field was observed by scanning electron microscopy. The force of a single MWNT coated with Ni was simulated, and the results demonstrate that the magnetic field force could induce the rotation of MWNTs/Ni during magnetic field assisted heat-treatment. The field emission characteristics show that the MWNTs/Ni cathodes heat-treated with magnetic field has a low turn-on field of 0.80 Vm-1 and high field enhancement factor of 16068, which are attributed to the embossment of MWNTs/Ni from substrates under the magnetic field.
    • 基金项目: 国家高技术研究发展计划重大专项(批准号:2013AA030601)、国家自然科学基金(批准号:61106053,61101169)和电子薄膜与集成器件国家重点实验室开放基金(批准号:KFJJ201309)资助的课题.
    • Funds: Project supported by the National High Technology Research and Development Program of China (Grant No. 2013AA030601), the National Natural Science Foundation of China (Grant Nos. 61106053, 61101169), and the State Key Laboratory of Electronic Thin Films and Integrated Devices, China (Grant No. KFJJ201309).
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    Lee S H, Ma C C M, Yuen S M, Teng C C, Yen M Y, Huang Y L, Yu K C 2012 Diamon Related Mater. 25 111

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    Zheng L W, Hu L Q, Xiao X J, Yang F, Lin H, Guo T L 2011 Chin. Phys. B 20 128502

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    Sano N, Naito M, Kikuchi T 2007 Carbon 45 78

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    Yang C J, Park J I, Cho Y R 2007 Adv. Eng. Mater. 9 88

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    Vink T J, Gillies M, Kriege J C, Laar H W J J 2003 Appl. Phys. Lett. 83 3552

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    L W H, Zhang S 2012 Acta Phys. Sin. 61 018801 (in Chinese) [吕文辉, 张帅 2012 物理学报 61 018801]

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出版历程
  • 收稿日期:  2013-10-31
  • 修回日期:  2013-12-02
  • 刊出日期:  2014-04-05

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