title: Two-dimensional phonon transport in supported graphene.
abstract: 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 kappa 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 kappa in suspended graphene according to a theoretical calculation.
authors.affiliation: Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
authors.forename: Jae Hun
authors.initials: JH
authors.lastname: Seol
authors.forename: Insun
authors.initials: I
authors.lastname: Jo
authors.forename: Arden L
authors.initials: AL
authors.lastname: Moore
authors.forename: Lucas
authors.initials: L
authors.lastname: Lindsay
authors.forename: Zachary H
authors.initials: ZH
authors.lastname: Aitken
authors.forename: Michael T
authors.initials: MT
authors.lastname: Pettes
authors.forename: Xuesong
authors.initials: X
authors.lastname: Li
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yao
authors.forename: Rui
authors.initials: R
authors.lastname: Huang
authors.forename: David
authors.initials: D
authors.lastname: Broido
authors.forename: Natalio
authors.initials: N
authors.lastname: Mingo
authors.forename: Rodney S
authors.initials: RS
authors.lastname: Ruoff
authors.forename: Li
authors.initials: L
authors.lastname: Shi