Thermal conductivity of single-wall MoS2 nanotubes

SQ Li and WH Qi and SY Xiong and DQ Yu, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 124, 218 (2018).

DOI: 10.1007/s00339-018-1640-3

Using non-equilibrium molecular dynamics, the thermal conductivity of single-wall MoS2 nanotubes(MoS2 SWNTs) has been calculated for the first time. It has been found that the thermal conductivity of MoS2 SWNTs is two orders of magnitude smaller than that of carbon nanotubes. The temperature, length, and diameter dependence of thermal conductivity are also investigated. With the quantum corrected temperature, it reveals that the temperature-dependent thermal conductivities show a peaking behavior before falling off at higher temperature. The length effect on thermal conductivity indicates that a gradual transition from the nearly pure ballistic phonon transport to diffusive-ballistic phonon transport and converges with length much slower than the cases in monolayer MoS2 nanosheets or nanoribbons. At longer lengths with stronger diffusive effect, the thermal of conductivity is larger for smaller diameters.

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