1. Physisorption & Chemisorption of Oxygen Molecules on Single- and Multi-walled Carbon Nanotubes.
- Author
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Hatami, M., Farmany, A., and Sahraei, R.
- Subjects
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PHYSISORPTION , *CHEMISORPTION , *SINGLE walled carbon nanotubes testing , *MULTIWALLED carbon nanotube testing , *GAS absorption & adsorption , *CHEMICAL detectors - Abstract
The unique porosity of single- and multi-walled carbon nanotubes has prompted considerable interest in their gas adsorption properties. Among all gases, the interactions of oxygen with single-wall carbon nanotubes are widely studied. Sensitivity of their electronic properties to oxygen exposure can be used as the basis for a chemical sensor. Recent studies have shown that the transport properties of single-walled nanotubes change dramatically upon exposure to oxygen molecules. Practical applications for the production of better gas sensors asthermoelectric nano-nosis a key issue in the subject. Also, oxygen molecules could affect transport properties indirectly, by binding to donor or acceptor centers in the substrate or at the contacts or directly, by binding to the nanotube. Oxygen gas could be physisorbed via dispersive van der Waals forces or chemisorbed via formation of a chemical bond, and adsorption could take place either on perfect nanotube walls or at defect sites. We review the recent works published on the both theoretical and experimental study of adsorption data concerning the oxygen gas on the carbon nanotube materials. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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