Electronic structures of the Fe-layer catalyzed carbon nanotubes studied by x-ray-absorption spectroscopy
碩士 === 淡江大學 === 物理學系 === 89 === X-ray absorption near edge structure (XANES) measurements have been performed to investigate the local electronic structures of the Fe catalyzed and stabilized carbon nanotubes (CNT) with various diameters. The intensities of the π*- and σ*-band and the int...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/89894781743557323302 |
| Summary: | 碩士 === 淡江大學 === 物理學系 === 89 === X-ray absorption near edge structure (XANES) measurements have been performed to investigate the local electronic structures of the Fe catalyzed and stabilized carbon nanotubes (CNT) with various diameters. The intensities of the π*- and σ*-band and the interlayer-state features in the C K-edge XANES spectra of these CNTs vary with the diameter of the CNT. The white-line features at the C K- and Fe L3-edges suggest a strong hybridization between the C 2p and Fe 3d orbitals which lead to enhancement of the C K- and reduction of the Fe L3-edge features, respectively, indicative of a charge transfer from C 2p to Fe 3d orpitals. The Fe K-edge spectra reveal a p-d rehybridization effect that reduces p-orbital occupation at the Fe site.
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