Electronic Structure of the Fe-layer Catalyzed Carbon Nanotubes Studied by X-ray-absorption Spectroscopy
Journal
Applied Physics Letters
Journal Volume
79
Journal Issue
19
Pages
3179-3181
Date Issued
2001
Author(s)
C. L. Yeh
Abstract
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 an 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 orbitals. The Fe K-edge spectra reveal a p-d rehybridization effect that reduces p-orbital occupation at the Fe site. © 2001 American Institute of Physics.
Publisher
American Institute of Physics
Type
journal article