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    题名: 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.
    贡献者: 淡江大學物理學系
    关键词: nitrogen-doped diamonds;carbon nanotubes;XANES
    日期: 2001-03-01
    上传时间: 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 ®lms 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 ®lms resemble that of the undoped diamond regardless of the dopant concentration, which suggest that the overall bonding con®guration 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 * and * 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
    显示于类别:[物理學系暨研究所] 期刊論文


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