A comparative study of the electronic structures of oxygen- and chlorine-treated nitrogenated carbon nanotubes by x-ray absorption and scanning photoelectron microscopy

作者：Ray, S C; Pao, C W; Tsai, H M; Chiou, J W; Pong, W F^*; Chen, C W; Tsai, M H; Papakonstantinou, P; Chen, L C; Chen, K H

来源：Applied Physics Letters, 2007, 91(20): 202102.

DOI：10.1063/1.2807275

The electronic structures and bonding properties of oxygen- and chlorine-treated nitrogenated carbon nanotubes (N-CNTs) were studied using x-ray absorption near-edge structure (XANES) and scanning photoelectron microscopy. Features in the C K-edge XANES spectra are shifted by similar to 0.3 eV toward higher energies and by similar to 1.1 eV toward lower energies relatively to those of the more symmetrical pyridinelike and graphitelike structured N-CNTs upon chlorination and oxidation, respectively. Increases in N K-edge XANES intensities for both chlorination and oxidation reveal substitution of C-C bonds by C-N bonds consistent with the observed valence-band photoemission spectra of the decrease of the C 2s bond and the increase of the N 2s bond.

• 出版日期2007-11-12
• 单位中山大学