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Carbon dioxide detection by boron nitride nanotubes

Mousavi, Hamze and Kurdestany, Jamshid Moradi and Bagheri, Mehran (2012) Carbon dioxide detection by boron nitride nanotubes. In: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 108 (2). pp. 283-289.

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Official URL: http://dx.doi.org/10.1007/s00339-012-6933-3

Abstract

The effect of gas molecule adsorption is investigated on the density of states of (9,0) zigzag boron nitride nanotube within a random tight-binding Hamiltonian model. The Green function approach and coherent potential approximation have been implemented. The results show that the adsorption of carbon dioxide gas molecules by boron atoms only leads to a donor type semiconductor while the adsorption by nitrogen atoms only leads to an acceptor. Since the gas molecules are adsorbed by both boron and nitrogen atoms, a reduction of the band gap is found. In all cases, increasing the gas concentration causes an increase in the height of the peaks in the band gap. This is due to an increasing charge carrier concentration induced by adsorbed gas molecules.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to Springer-Verlag
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Aug 2012 03:50
Last Modified: 21 Aug 2012 03:50
URI: http://eprints.iisc.ernet.in/id/eprint/44956

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