The effects of diameter and chirality on the thermal transport in free- standing and supported carbon-nanotubes

B Qiu and Y Wang and Q Zhao and XL Ruan, APPLIED PHYSICS LETTERS, 100, 233105 (2012).

DOI: 10.1063/1.4725194

We use molecular dynamics simulations to explore the lattice thermal transport in free-standing and supported single-wall carbon-nanotube (SWCNT) in comparison to that in graphene nanoribbon and graphene sheet. For free-standing SWCNT, the lattice thermal conductivity increases with diameter and approaches that of graphene, partly due to the curvature. Supported SWCNT thermal conductivity is reduced by 34%-41% compared to the free-standing case, which is less than that in supported graphene. Also, it shows an evident chirality dependence by varying about 10%, which we attribute to chirality-dependent interfacial phonon scattering. (C) 2012 American Institute of Physics.

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