Doping of single-walled carbon nanotube bundles by Brønsted acids

Graupner R, Abraham J, Vencelová A, Seyller T, Hennrich F, Kappes M, Hirsch A, Ley L (2003)

Publication Type: Journal article, Original article

Publication year: 2003


Original Authors: Graupner R., Abraham J., Vencelova A., Seyller T., Hennrich F., Kappes M.M., Hirsch A., Ley L.

Publisher: Royal Society of Chemistry

Book Volume: 5

Pages Range: 5472-5476

Journal Issue: 24

DOI: 10.1039/b311016h


Using X-ray induced photoelectron spectroscopy, the influence of Brønsted acids, namely sulfuric, nitric, and hydrochloric acid on the electronic properties of single-walled carbon nanotubes (SWCNTs) was investigated. Doping effects were monitored by changes in binding energy of the C 1s core level of the nanotubes. For all three acids, an acceptor type doping of the SWCNTs was observed by a shift of the C 1s core level towards lower binding energies. The inferred change of the Fermi-level position was 0.5 eV in the case of HSO, 0.2 eV in the case of HNO, and 0.1 eV in the case of HCl. For HNO and HCl the doping was found to be unstable. The S 2p, N 1s, and Cl 2p core level spectra of the corresponding acid showed spectral features which can be attributed to the respective oxidation state of these anions in the acid, indicating that doping was induced by intercalation.

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Graupner, R., Abraham, J., Vencelová, A., Seyller, T., Hennrich, F., Kappes, M.,... Ley, L. (2003). Doping of single-walled carbon nanotube bundles by Brønsted acids. Physical Chemistry Chemical Physics, 5(24), 5472-5476.


Graupner, Ralf, et al. "Doping of single-walled carbon nanotube bundles by Brønsted acids." Physical Chemistry Chemical Physics 5.24 (2003): 5472-5476.

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