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Thermal conductivity of suspended few-layer MoS2

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Abstract

Modifying phonon thermal conductivity in nanomaterials is important not only for fundamental research but also for practical applications. However, the experiments on tailoring thermal conductivity in nanoscale, especially in two-dimensional materials, are rare due to technical challenges. In this work, we demonstrate the in situ thermal conduction measurement of MoS2 and find that its thermal conductivity can be continuously tuned to a required value from crystalline to amorphous limits. The reduction of thermal conductivity is understood from phonon-defect scattering that decreases the phonon transmission coefficient. Beyond a threshold, a sharp drop in thermal conductivity is observed, which is believed to be due to a crystalline–amorphous transition. Our method and results provide guidance for potential applications in thermoelectrics, photoelectronics, and energy harvesting where thermal management is critical with further integration and miniaturization.

Graphical abstract: Thermal conductivity of suspended few-layer MoS2

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Publication details

The article was received on 10 Oct 2017, accepted on 15 Dec 2017 and first published on 20 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR07522G
Citation: Nanoscale, 2018, Advance Article
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    Thermal conductivity of suspended few-layer MoS2

    A. Aiyiti, S. Hu, C. Wang, Q. Xi, Z. Cheng, M. Xia, Y. Ma, J. Wu, J. Guo, Q. Wang, J. Zhou, J. Chen, X. Xu and B. Li, Nanoscale, 2018, Advance Article , DOI: 10.1039/C7NR07522G

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