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Title: Thermal conductivity and thermal rectification in unzipped carbon nanotubes
Authors: Ni, X.
Zhang, G.
Li, B. 
Issue Date: 1-Jun-2011
Citation: Ni, X., Zhang, G., Li, B. (2011-06-01). Thermal conductivity and thermal rectification in unzipped carbon nanotubes. Journal of Physics Condensed Matter 23 (21) : -. ScholarBank@NUS Repository.
Abstract: We study the thermal transport in completely unzipped carbon nanotubes, which are called graphene nanoribbons, partially unzipped carbon nanotubes, which can be seen as carbon-nanotube-graphene-nanoribbon junctions, and carbon nanotubes by using molecular dynamics simulations. It is found that the thermal conductivity of a graphene nanoribbon is much less than that of its perfect carbon nanotube counterparts because of the localized phonon modes at the boundary. A partially unzipped carbon nanotube has the lowest thermal conductivity due to additional localized modes at the junction region. More strikingly, a significant thermal rectification effect is observed in both partially unzipped armchair and zigzag carbon nanotubes. Our results suggest that carbon-nanotube-graphene-nanoribbon junctions can be used in thermal energy control. © 2011 IOP Publishing Ltd.
Source Title: Journal of Physics Condensed Matter
ISSN: 09538984
DOI: 10.1088/0953-8984/23/21/215301
Appears in Collections:Staff Publications

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