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This article is cited in 26 scientific papers (total in 26 papers)
Low dimensional systems
Electronic structure of nitrogen-containing carbon nanotubes irradiated with argon ions: XPS and XANES studies
S. N. Nesova, P. M. Korusenkoa, V. V. Bolotova, S. N. Povoroznyukab, D. A. Smirnovcd a Omsk Scientific Center, Siberian Branch of the Russian Academy of Sciences
b Omsk State Technical University
c Saint Petersburg State University
d Institute of Solid State Physics, Dresden University of Technology,
Dresden, Germany
Abstract:
Using the methods of X-ray photoelectron (XPS) and X-ray absorption near edge structure (XANES) spectroscopies with synchrotron radiation, data on changes in the electronic structure and chemical composition of nitrogen-containing multiwalled carbon nanotubes (N-MWCNTs) upon their exposure to the radiation of argon ions with an energy of 5 keV are obtained. It is found that the exposure leads to an increase in the degree of defectiveness of the N-MWCNTs structure and to the carbon oxidation with formation of various oxygen-containing groups (C–OH,
C = O/COOH, C–O–C/O–C–O, and CO$_3$). The presence of carbon–oxygen bonds on the surface of carbon nanotubes is associated with the formation of radiation defects. It is shown that an increase in the fraction of nitrogen atoms present in the substituting configuration in the N-MWCNTs wall structure due to the irradiation does not give rise to an increase in the density of the occupied states near the Fermi level against the background of an increase in the degree of structure defectiveness, carbon oxidation, and a decrease in the total nitrogen concentration. The obtained results show that the irradiation of N-MWCNTs with argon ions allows one to successfully functionalize their surface.
Received: 11.04.2017
Citation:
S. N. Nesov, P. M. Korusenko, V. V. Bolotov, S. N. Povoroznyuk, D. A. Smirnov, “Electronic structure of nitrogen-containing carbon nanotubes irradiated with argon ions: XPS and XANES studies”, Fizika Tverdogo Tela, 59:10 (2017), 2006–2010; Phys. Solid State, 59:10 (2017), 2030–2035
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https://www.mathnet.ru/eng/ftt9435 https://www.mathnet.ru/eng/ftt/v59/i10/p2006
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