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Two-Dimensional Phonon Transport in Supported Graphene

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Science  09 Apr 2010:
Vol. 328, Issue 5975, pp. 213-216
DOI: 10.1126/science.1184014

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Heat Flow in Graphene

Unsupported graphene sheets show exceptional thermal transport properties, but are these properties maintained when a graphene sheet is in contact with a substrate? Seol et al. (p. 213; see the Perspective by Prasher) measured the thermal conductivity of graphene supported on silicon dioxide and found that, while the conductivity was considerably lower than that of free-standing graphene, it was still greater than that of metals such as copper. A theoretical model suggested that the out-of-plane flexing vibrations of the graphene play a key role in thermal transport. Thus, graphene may help in applications such as conducting heat away from electronic circuits.

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