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- W4200351540 abstract "Grain boundaries (GBs) are inevitable defects in large-area MoS2 samples but they play a key role in their properties, however, the influence of grain misorientation on thermal transport has largely remained unknown. Here, the critical role of misorientation angle in thermal transport characteristics across 5|7 polar dislocation-dominated GBs in monolayer MoS2 is explored using nonequilibrium molecular dynamics simulations. Results show that thermal transport characteristics of defective GBs are greatly dictated by the misorientation angle, with U-shaped thermal conductance as misorientation angle varying from around 5.06-52.26°, as well as by GB energy, 5|7 dislocation type and the grain size. Such unique thermal transport across GBs is primarily attributed to rising phonon-boundary softening and scattering with increasing dislocation density at GBs or GB energy, as well as an increase in localized phonon modes. The study establishes the fundamental relationship between GB and the thermal properties of single-layer MoS2 and highlights the vital role of GBs in designing efficient thermoelectric and thermal management transition metal dichalcogenides." @default.
- W4200351540 created "2021-12-31" @default.
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- W4200351540 date "2022-01-01" @default.
- W4200351540 modified "2023-10-14" @default.
- W4200351540 title "Grain boundary and misorientation angle-dependent thermal transport in single-layer MoS<sub>2</sub>" @default.
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- W4200351540 doi "https://doi.org/10.1039/d1nr05113j" @default.
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