Nano Archive

Structural and electronic characteristics of perhydrogenated carbon nanotubes

Tanskanen, Jukka T. and Linnolahti, Mikko and Karttunen, Antti J. and Pakkanen, Tapani A. (2007) Structural and electronic characteristics of perhydrogenated carbon nanotubes. CHEMICAL PHYSICS, 340 (1-3). pp. 120-126.

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The structural and electronic characteristics of fully hydrogenated armchair and zigzag carbon nanotubes have been determined by quantum chemical methods. With use of line group symmetries, the structures of nanotubes up to 10 nm in diameter could be optimized by periodic B3LYP calculations. ``In-out'' isomerism is shown to signiticantly stabilize perhydrogenated carbon nanotubcs, the energetically most favorable structures being those with 1/3-1/2 of the carbon atoms endo-hydrogenated. In favored nanotubes the ratio of endo- to exo-hydrogens is 1:1, the stabilities increasing as a function of the diameter of the nanotube. The calculated band gaps indicate that the perhydrogenated carbon nanotubes are insulators. (C) 2007 Elsevier B.V. All rights reserved.

Item Type:Article
Uncontrolled Keywords:line group symmetries; carbon nanotubes; hydrogenation; quantum chemistry; band gap
Subjects:Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2957
Deposited By:Anuj Seth
Deposited On:12 Jan 2009 15:50
Last Modified:20 Jan 2009 12:57

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