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Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures.

Pumarol, Manuel and Rosamond, Mark Christopher and Tovee, Peter D. and Petty, Michael C. and Zeze, Dagou A and Falko, Vladimir I and Kolosov Oleg V., (2012) 'Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures.', Nano letters., 12 (6). pp. 2906-2911.

Abstract

We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.

Item Type:Article
Keywords:Nanoscale thermal transport, Nanoscale imaging, Ballistic phonons, Thermal conductivity, Graphene, Scanning thermal microscopy
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1021/nl3004946
Publisher statement:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/nl3004946
Record Created:17 Feb 2015 15:35
Last Modified:17 Feb 2015 15:45

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