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    题名: Effect of Mo-buffer layer on the growth behavior and the electron field emission properties of UNCD films
    作者: Liu, Keng-Fu;Chen, Li-Ju;Tai, Nyan-Hua;Lin, I-Nan
    贡献者: 淡江大學物理學系
    关键词: Ultra-nanocrystalline diamond films;Mo-buffer layer;Nucleation behavior;Electron field emission properties
    日期: 2009-02
    上传时间: 2010-02-23 14:21:00 (UTC+8)
    出版者: Lausanne: Elsevier S.A.
    摘要: Mo-coating on Si-substrate is observed to significantly improve the formation kinetics of diamond nuclei and the growth behavior of ultra-nanocrystalline diamond (UNCD) films. Contrary to the phenomenon that diamond nuclei are only scarcely formed on bare Si-substrates leading to incomplete coverage of UNCD grains, the diamond nuclei (and the UNCD grains) are found to cover the whole surface of Mo-coated Si-substrates. While the Mo-coating markedly enhances the nucleation of diamonds, it degrades the electron field emission (EFE) properties of UNCD films. It is attributed to the conversion of the conducting Mo-metallic film into a resistive Mo2C layer during the microwave plasma CVD process. A sufficiently thick Mo-layer is found to enhance the nucleation of diamonds, while minimizing deleterious effect on their EFE properties with an improved turn-on-field of 13 V/μm and a current density of 55 μA/cm2 at the applied field of 30 V/μm.
    關聯: Diamond and Related Materials 18(2-3), pp.181-185
    DOI: 10.1016/j.diamond.2008.09.017
    显示于类别:[物理學系暨研究所] 期刊論文

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