淡江大學機構典藏:Item 987654321/97201
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    题名: Investigations on Diamond Nanostructuring of Different Morphologies by the Reactive-Ion Etching Process and Their Potential Applications
    作者: Srinivasu Kunuku;Kamatchi Jothiramalingam Sankaran;Cheng-Yen Tsai;Wen-Hao Chang;Nyan-Hwa Tai;Keh-Chyang Leou;Lin, I-Nan
    贡献者: 淡江大學物理學系
    关键词: diamond nanostructures;reactive ion etching;Au nanodots;ion bombardment;electron field emission;photoluminescence
    日期: 2013-08
    上传时间: 2014-03-18 10:01:36 (UTC+8)
    出版者: Washington, DC: American Chemical Society
    摘要: We report the systematic studies on the fabrication of aligned, uniform, and highly dense diamond nanostructures from diamond films of various granular structures. Self-assembled Au nanodots are used as a mask in the self-biased reactive-ion etching (RIE) process, using an O2/CF4 process plasma. The morphology of diamond nanostructures is a close function of the initial phase composition of diamond. Cone-shaped and tip-shaped diamond nanostructures result for microcrystalline diamond (MCD) and nanocrystalline diamond (NCD) films, whereas pillarlike and grasslike diamond nanostructures are obtained for Ar-plasma-based and N2-plasma-based ultrananocrystalline diamond (UNCD) films, respectively. While the nitrogen-incorporated UNCD (N-UNCD) nanograss shows the most-superior electron-field-emission properties, the NCD nanotips exhibit the best photoluminescence properties, viz, different applications need different morphology of diamond nanostructures to optimize the respective characteristics. The optimum diamond nanostructure can be achieved by proper choice of granular structure of the initial diamond film. The etching mechanism is explained by in situ observation of optical emission spectrum of RIE plasma. The preferential etching of sp2-bonded carbon contained in the diamond films is the prime factor, which forms the unique diamond nanostructures from each type of diamond films. However, the excited oxygen atoms (O*) are the main etching species of diamond film.
    關聯: ACS Applied Materials and Interfaces 5(15), pp.7439-7449
    DOI: 10.1021/am401753h
    显示于类别:[物理學系暨研究所] 期刊論文

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