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Conference Paper

Interaction of molecular oxygen with single-wall carbon nanotube bundles and graphite

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Ulbricht,  Hendrik
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Moos,  Gunnar
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Hertel,  Tobias
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Ulbricht, H., Moos, G., & Hertel, T. (2003). Interaction of molecular oxygen with single-wall carbon nanotube bundles and graphite. Surface Science, 532-535, 852-856.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-0FFD-A
Abstract
The adsorption of oxygen on highly oriented pyrolytic graphite (HOPG) and bundles of single-wall carbon nanotubes (SWNTs) at 28 K is studied using thermal desorption spectroscopy and by a measurement. of sticking probabilities. The low-coverage binding energy of oxygen adsorbed on SWNT bundles, 18.5 kJ/mol, is 55% higher than the low-coverage binding energy on HOPG, 12.0 kJ/mol. Molecular mechanics calculations reveal that such an increase can be attributed to the higher effective coordination of binding sites on SWNT bundles. The character of the oxygen-SWNT interaction should therefore be van der Waals type which suggests that the observed oxygen species is physisorbed and does not facilitate bulk doping of SWNT samples.