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Two-Dimensional Phonon Transport in Supported Graphene
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Two-Dimensional Phonon Transport in Supported Graphene
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Two-Dimensional Phonon Transport in Supported Graphene
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Journal Article
Two-Dimensional Phonon Transport in Supported Graphene
2010
Overview
The reported thermal conductivity (κ) 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 κ 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 κ in suspended graphene according to a theoretical calculation.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science,American Association for the Advancement of Science (AAAS)
Subject
/ Carbon
/ Condensed matter: structure, mechanical and thermal properties
/ copper
/ Exact sciences and technology
/ Graphene
/ Graphite
/ heat
/ Phonons
/ Physical properties of thin films, nonelectronic
/ Physics
/ silica
/ Silicon
/ Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
