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.

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
• Public URL: https://durham-repository.worktribe.com/output/1506888