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Title: Substrate coupling suppresses size dependence of thermal conductivity in supported graphene
Authors: Chen, J.
Zhang, G.
Li, B. 
Issue Date: 21-Jan-2013
Citation: Chen, J., Zhang, G., Li, B. (2013-01-21). Substrate coupling suppresses size dependence of thermal conductivity in supported graphene. Nanoscale 5 (2) : 532-536. ScholarBank@NUS Repository.
Abstract: Thermal conductivity κ of both suspended and supported graphene has been studied by using molecular dynamics simulations. An obvious length dependence is observed in κ of suspended single-layer graphene (SLG), while κ of supported SLG is insensitive to the length. The simulation result of room temperature κ of supported SLG is in good agreement with the experimental value. In contrast to the decrease in κ induced by inter-layer interaction in suspended few-layer graphene (FLG), κ of supported FLG is found to increase rapidly with the layer thickness, reaching about 90% of that of bulk graphite at six layers, and eventually saturates at the thickness of 13.4 nm. More interestingly, unlike the remarkable substrate dependent κ in SLG, the effect of substrate on thermal transport is much weaker in FLG. The underlying physics is investigated and presented. This journal is © The Royal Society of Chemistry.
Source Title: Nanoscale
ISSN: 20403364
DOI: 10.1039/c2nr32949b
Appears in Collections:Staff Publications

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