RT Journal Article
SR Electronic
T1 Two-Dimensional Phonon Transport in Supported Graphene
JF Science
JO Science
FD American Association for the Advancement of Science
SP 213
OP 216
DO 10.1126/science.1184014
VO 328
IS 5975
A1 Seol, Jae Hun
A1 Jo, Insun
A1 Moore, Arden L.
A1 Lindsay, Lucas
A1 Aitken, Zachary H.
A1 Pettes, Michael T.
A1 Li, Xuesong
A1 Yao, Zhen
A1 Huang, Rui
A1 Broido, David
A1 Mingo, Natalio
A1 Ruoff, Rodney S.
A1 Shi, Li
YR 2010
UL http://science.sciencemag.org/content/328/5975/213.abstract
AB 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.