Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 24, 2003
Previous Article Next Article

Doping of single-walled carbon nanotube bundles by Brønsted acids

Author affiliations

Abstract

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 H2SO4, 0.2 eV in the case of HNO3, and 0.1 eV in the case of HCl. For HNO3 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.

Back to tab navigation

Article information


Submitted
09 Sep 2003
Accepted
15 Oct 2003
First published
07 Nov 2003

Phys. Chem. Chem. Phys., 2003,5, 5472-5476
Article type
Paper

Doping of single-walled carbon nanotube bundles by Brønsted acids

R. Graupner, J. Abraham, A. Vencelová, T. Seyller, F. Hennrich, M. M. Kappes, A. Hirsch and L. Ley, Phys. Chem. Chem. Phys., 2003, 5, 5472
DOI: 10.1039/B311016H

Social activity

Search articles by author

Spotlight

Advertisements