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Title: Thermal transport in suspended and supported few-layer graphene
Authors: Wang, Z.
Xie, R. 
Bui, C.T.
Liu, D.
Ni, X.
Li, B. 
Thong, J.T.L. 
Keywords: Graphene
Phonon transport
Thermal boundary resistance
Thermal conductivity
Issue Date: 12-Jan-2011
Source: Wang, Z., Xie, R., Bui, C.T., Liu, D., Ni, X., Li, B., Thong, J.T.L. (2011-01-12). Thermal transport in suspended and supported few-layer graphene. Nano Letters 11 (1) : 113-118. ScholarBank@NUS Repository.
Abstract: We report thermal conductivity (κ) measurements from 77 to 350 K on both suspended and supported few-layer graphene using a thermal-bridge configuration. The room temperature value of κ is comparable to that of bulk graphite for the largest flake, but reduces significantly for smaller flakes. The presence of a substrate lowers the value of k, but the effect diminishes for the thermal transport in the top layers away from the substrate. For the suspended sample, the temperature dependence of k follows a power law with an exponent of 1.4 ± 0.1, suggesting that the flexural phonon modes contribute significantly to the thermal transport of the suspended graphene. The measured values of ± are generally lower than those from theoretical studies. We attribute this deviation to the phonon-boundary scattering at the graphene-contact interfaces, which is shown to significantly reduce the apparent measured thermal conductance of graphene. © 2011 American Chemical Society.
Source Title: Nano Letters
ISSN: 15306984
DOI: 10.1021/nl102923q
Appears in Collections:Staff Publications

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