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| 題名: | X-ray absorption studies of carbon-related materials |
| 作者: | Pong, Way-faung;Ray, Sekhar C;Tsai, H. M.;Chiou, Jau-Wern;Jan, J. C.;Kumar, Krishna;Chien, F. Z.;Tsai, M. H.;Chattopadhyay, Surojit;Chen, L. C.;Lee, S. T.;Lin, S. T.;Chen, K. H. |
| 貢獻者: | 淡江大學物理學系 |
| 關鍵詞: | nitrogen-doped diamonds;carbon nanotubes;XANES |
| 日期: | 2001-03-01 |
| 上傳時間: | 2009-12-31 10:32:25 (UTC+8) |
| 出版者: | Malden: Wiley-Blackwell Publishing, Inc. |
| 摘要: | X-ray absorption near-edge structure (XANES) measurements have been performed on nitrogen-doped diamond films with three different dopant concentrations and iron-layer-stabilized carbon nanotube (CNT) structures with various diameters at the C Kabsorption edge using the sample drain current mode. The C K-edge XANES spectra of these N-doped diamond films resemble that of the undoped diamond regardless of the dopant concentration, which suggest that the overall bonding configuration of the C atom is unaltered. N dopants are found to reduce the intensities of both the sp2 - and sp3 -bond-derived resonance features in the XANES spectra. On the other hand, the C K-edge XANES spectra of CNTs indicate that the intensities of the π* and σ* bands and the interlayer-state features vary with the diameter of the CNT. This phenomenon may be caused by the Fe-layer-catalysed bending of the graphite sheet and the interaction between C and Fe atoms. |
| 關聯: | Journal of synchrotron radiation 8(2), pp.145-149 |
| DOI: | 10.1107/S0909049500019750 |
| 顯示於類別: | [物理學系暨研究所] 期刊論文
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