Thermal Conductivity of Suspended Few-Layer MoS2

Abstract

Modifying phonon thermal conductivity in nanomaterials is important not only for fundamental research but also for practical applications. However, the experiments on tailoring the thermal conductivity in nanoscale, especially in two-dimensional materials, are rare due to technical challenges. In this work, we demonstrate 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-defects scatterings that decrease the phonon transmission coefficient. Beyond a threshold, a sharp drop in thermal conductivity is observed, which is believed to be 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.

arXiv comment16 pages, 4 figures, Published in Nanoscale, 2018,10, 2727-2734 See this page http://pubs.rsc.org/en/content/articlepdf/2018/nr/c7nr07522g

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Cited by in corpus (6)

• Review on thermoelectric properties of transition metal dichalcogenides
• Thermal Transport in MoS${}_2$ from Molecular Dynamics using Different Empirical Potentials
• Measuring the thermal conductivity and interfacial thermal resistance of suspended MoS2 using electron beam self-heating technique
• Robust B-exciton emission at room temperature in few-layers of MoS2:Ag nanoheterojunctions embedded into a glass matrix
• Investigation and field effect tuning of thermoelectric properties of SnSe2 flakes
• Heat dissipation in few-layer MoS2 and MoS2/hBN heterostructure