We have investigated the electronic states of highly oriented pyrolitic graphite and single-walled carbon nanotubes using x-ray absorption spectroscopy XAS before and after annealing treatment in ultrahigh vacuum, and observed that the small peak between * and * features, which has been previously assigned to free-electron-like interlayer states, disappears after in situ annealing treatment, suggesting that the signal may be assigned to a surface contamination, especially oxygen contamination introduced by chemical processing or gas adsorption. Additional experiments by photoelectron spectroscopy as well as XAS methods, performed after aging in air, fully support this interpretation.

Abbas, M., Wu, Z., Ibrahim, K., Fiori, A., Orlanducci, S., Sessa, V., et al. (2005). X-ray absorption and photoelectron spectroscopic studies of graphite and single-walled carbon nanotubes: oxygen effect. APPLIED PHYSICS LETTERS, 87, 0519231-0519234 [10.1063/1.2006214].

X-ray absorption and photoelectron spectroscopic studies of graphite and single-walled carbon nanotubes: oxygen effect

ORLANDUCCI, SILVIA;SESSA, VITO;TERRANOVA PERSICHELLI, MARIA LETIZIA;DAVOLI, IVAN
2005-01-01

Abstract

We have investigated the electronic states of highly oriented pyrolitic graphite and single-walled carbon nanotubes using x-ray absorption spectroscopy XAS before and after annealing treatment in ultrahigh vacuum, and observed that the small peak between * and * features, which has been previously assigned to free-electron-like interlayer states, disappears after in situ annealing treatment, suggesting that the signal may be assigned to a surface contamination, especially oxygen contamination introduced by chemical processing or gas adsorption. Additional experiments by photoelectron spectroscopy as well as XAS methods, performed after aging in air, fully support this interpretation.
2005
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/03 - CHIMICA GENERALE E INORGANICA
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
graphite;SWCNT; X-ray absorption
Abbas, M., Wu, Z., Ibrahim, K., Fiori, A., Orlanducci, S., Sessa, V., et al. (2005). X-ray absorption and photoelectron spectroscopic studies of graphite and single-walled carbon nanotubes: oxygen effect. APPLIED PHYSICS LETTERS, 87, 0519231-0519234 [10.1063/1.2006214].
Abbas, M; Wu, Z; Ibrahim, K; Fiori, A; Orlanducci, S; Sessa, V; TERRANOVA PERSICHELLI, Ml; Davoli, I
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/16879
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