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Title: Heat conduction across monolayer and few-layer graphenes
Authors: Koh, Y.K. 
Bae, M.-H.
Cahill, D.G.
Pop, E.
Keywords: acoustic phonons
few-layer graphene
heat dissipation
Interfacial thermal conductance
metal contacts
thermal management of graphene devices
Issue Date: 10-Nov-2010
Citation: Koh, Y.K., Bae, M.-H., Cahill, D.G., Pop, E. (2010-11-10). Heat conduction across monolayer and few-layer graphenes. Nano Letters 10 (11) : 4363-4368. ScholarBank@NUS Repository.
Abstract: We report the thermal conductance G of Au/Ti/graphene/SiO2 interfaces (graphene layers 1 ≤ n ≤ 10) typical of graphene transistor contacts. We find G ≈ 25 MW m-2 K-1 at room temperature, four times smaller than the thermal conductance of a Au/Ti/ SiO2 interface, even when n = 1. We attribute this reduction to the thermal resistance of Au/Ti/graphene and graphene/SiO2 interfaces acting in series. The temperature dependence of G from 50 ≤ T ≤ 500 K also indicates that heat is predominantly carried by phonons through these interfaces. Our findings suggest that metal contacts can limit not only electrical transport but also thermal dissipation from submicrometer graphene devices. © 2010 American Chemical Society.
Source Title: Nano Letters
ISSN: 15306984
DOI: 10.1021/nl101790k
Appears in Collections:Staff Publications

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