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

SC Ray, CW Pao, HM Tsai, JW Chiou, WF Pong, CW Chen, MH Tsai, P Papakonstantinou, LC Chen, KH Chen

Research output: Contribution to journalArticle

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Abstract

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. (c) 2007 American Institute of Physics.
LanguageEnglish
Pages202102
JournalApplied Physics Letters
Volume91
Issue number20
DOIs
Publication statusPublished - 12 Nov 2007

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x ray absorption
chlorine
photoelectrons
carbon nanotubes
electronic structure
microscopy
scanning
oxygen
chlorination
oxidation
photoelectric emission
substitutes
valence
physics
energy

Cite this

Ray, SC ; Pao, CW ; Tsai, HM ; Chiou, JW ; Pong, WF ; Chen, CW ; Tsai, MH ; Papakonstantinou, P ; Chen, LC ; Chen, KH. / A comparative study of the electronic structures of oxygen- and chlorine-treated nitrogenated carbon nanotubes by x-ray absorption and scanning photoelectron microscopy. In: Applied Physics Letters. 2007 ; Vol. 91, No. 20. pp. 202102.
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abstract = "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. (c) 2007 American Institute of Physics.",
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A comparative study of the electronic structures of oxygen- and chlorine-treated nitrogenated carbon nanotubes by x-ray absorption and scanning photoelectron microscopy. / Ray, SC; Pao, CW; Tsai, HM; Chiou, JW; Pong, WF; Chen, CW; Tsai, MH; Papakonstantinou, P; Chen, LC; Chen, KH.

In: Applied Physics Letters, Vol. 91, No. 20, 12.11.2007, p. 202102.

Research output: Contribution to journalArticle

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AU - Ray, SC

AU - Pao, CW

AU - Tsai, HM

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AU - Pong, WF

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AU - Papakonstantinou, P

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AU - Chen, KH

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AB - 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. (c) 2007 American Institute of Physics.

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