English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49189/83570 (59%)
造訪人次 : 7089663      線上人數 : 49
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/27479


    題名: Growth, characterization, optical and X-ray absorption studies of nano-crystalline diamond films
    作者: Chen, L. C.;Wang, T. Y.;Yang, J. R.;彭維鋒;Pong, W. F.
    貢獻者: 淡江大學物理學系
    關鍵詞: Microwave CVD;Nano-diamond film;Optical transmittance;Transmission electron microscopy;X-ray absorption
    日期: 2000-03
    上傳時間: 2009-12-31 10:11:25 (UTC+8)
    出版者: Elsevier
    摘要: We report here the growth of thin diamond films, with an average grain size ranged from 3.6 nm to 5 μm, by microwave plasma enhanced chemical vapor deposition via different substrate pretreatment and varying methane fraction in the source gas. Specifically, the substrate pretreatment involved using two different grain sizes, 4 nm and 0.1 μm, of the diamond powder for ultrasonic agitation. Transmission electron microscopy, optical transmission spectra, and X-ray absorption spectra have been employed to characterize the resultant films. For each film, the grain size distribution was obtained by directly analyzing the dark-field images of the film. For films deposited with 0.1 μm diamond powder pretreatment, the grain size of the film decreased as the methane fraction increased. The opposite trend was observed for 4 nm diamond powder pretreated films. X-ray absorption spectra at the C K-edge showed clear bulk diamond excitonic and sp3 features with little evidence of sp2 bonding even for films with an average grain size as low as 3.6 nm. Furthermore, a blue shift of the exciton state and conduction band edge was observed with the decrease of the grain size of the film, indicating a quantum confinement effect. On the other hand, no direct relationship between the grain size of the film and the optical transmission was observed. The key parameter that dictated the optical transparency of the film was the surface roughness provided that the film maintained high sp3 content.
    關聯: Diamond and Related Materials 9(3-6), pp.877-882
    DOI: 10.1016/S0925-9635(99)00355-6
    顯示於類別:[物理學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    0KbUnknown232檢視/開啟
    index.html0KbHTML32檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋