Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.205901
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Funding
- U.S. National Science foundation [0821604, 1067213, 1308550]
- Lockheed Martin Corporate
- National Natural Science Foundation of China [51176032]
- National Basic Research Program of China [2011CB707605]
- Office of Naval Research [N00014-07-1-0723]
- Research Project of State Key Laboratory of Mechanical System and Vibration [MSV201413]
- National Science Foundation [ECS-0335765]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1308550] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1067213] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0821604] Funding Source: National Science Foundation
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Measurements of thermal transport through contacts between individual multiwall carbon nanotubes show that, contrary to common expectation, the normalized contact thermal conductance per unit area depends linearly on the tube diameter. The result is corroborated with and extended to multilayer graphene nanoribbons through molecular dynamics simulations. Semiquantitative analyses show that these intriguing observations are consistent with an explanation based on an unexpectedly large phonon mean free path in the c-axis direction of graphite, phonon reflection at free surfaces, and phonon focusing in highly anisotropic graphitic materials.
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