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

Pumarol, Manuel; Rosamond, Mark Christopher; Tovee, Peter D.; Petty, Michael C.; Zeze, Dagou A; Falko, Vladimir I; Kolosov Oleg, V.

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


Authors

Manuel Pumarol

Mark Christopher Rosamond

Peter D. Tovee

Michael C. Petty

Vladimir I Falko

V. Kolosov Oleg



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.

Citation

Pumarol, M., Rosamond, M. C., Tovee, P. D., Petty, M. C., Zeze, D. A., Falko, V. I., & Kolosov Oleg, V. (2012). Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures. Nano Letters, 12(6), 2906-2911. https://doi.org/10.1021/nl3004946

Journal Article Type Article
Publication Date Apr 1, 2012
Deposit Date Apr 27, 2012
Publicly Available Date Feb 17, 2015
Journal Nano Letters
Print ISSN 1530-6984
Electronic ISSN 1530-6992
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 12
Issue 6
Pages 2906-2911
DOI https://doi.org/10.1021/nl3004946
Keywords Nanoscale thermal transport, Nanoscale imaging, Ballistic phonons, Thermal conductivity, Graphene, Scanning thermal microscopy

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Copyright 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





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