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

Pumarol Crestar, Manuel and Rosamond, Mark C. and Tovee, Peter and Petty, Michael C. and Zeze, Dagou A. and Falko, Vladimir and Kolosov, Oleg V. (2012) Direct nanoscale imaging of ballistic and diffusive thermal transport in graphene nanostructures. Nano Letters, 12 (6). pp. 2906-2911. ISSN 1530-6984

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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:
Journal Article
Journal or Publication Title:
Nano Letters
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57118
Deposited By:
Deposited On:
14 Aug 2012 15:35
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Oct 2020 07:23