Journal
SCIENCE
Volume 328, Issue 5975, Pages 213-216Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1184014
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Funding
- National Science Foundation [CBET-0553649, 0933454, CBET 0651381, 0651310, CMMI-0926851]
- Office of Naval Research [N00014-08-1-1168]
- Department of Energy Office of Science [DE-FG02-07ER46377]
- University of Texas at Austin
- Directorate For Engineering [0651310] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0926851] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys [0651310] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0933454] Funding Source: National Science Foundation
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The reported thermal conductivity (kappa) of suspended graphene, 3000 to 5000 watts per meter per kelvin, exceeds that of diamond and graphite. Thus, graphene can be useful in solving heat dissipation problems such as those in nanoelectronics. However, contact with a substrate could affect the thermal transport properties of graphene. Here, we show experimentally that k of monolayer graphene exfoliated on a silicon dioxide support is still as high as about 600 watts per meter per kelvin near room temperature, exceeding those of metals such as copper. It is lower than that of suspended graphene because of phonons leaking across the graphene-support interface and strong interface-scattering of flexural modes, which make a large contribution to k in suspended graphene according to a theoretical calculation.
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