3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide.

Title 3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide.
Authors H. Jang; C.R. Ryder; J.D. Wood; M.C. Hersam; D.G. Cahill
Journal Adv Mater
DOI 10.1002/adma.201700650
Abstract

ReS2 represents a different class of 2D materials, which is characterized by low symmetry having 1D metallic chains within the planes and extremely weak interlayer bonding. Here, the thermal conductivity of single-crystalline ReS2 in a distorted 1T phase is determined at room temperature for the in-plane directions parallel and perpendicular to the Re-chains, and the through-plane direction using time-domain thermoreflectance. ReS2 is prepared in the form of flakes having thicknesses of 60-450 nm by micromechanical exfoliation, and their crystalline orientations are identified by polarized Raman spectroscopy. The in-plane thermal conductivity is higher along the Re-chains, (70 ± 18) W m(-1) K(-1) , as compared to transverse to the chains, (50 ± 13) W m(-1) K(-1) . As expected from the weak interlayer bonding, the through-plane thermal conductivity is the lowest observed to date for 2D materials, (0.55 ± 0.07) W m(-1) K(-1) , resulting in a remarkably high anisotropy of (130 ± 40) and (90 ± 30) for the two in-plane directions. The thermal conductivity and interface thermal conductance of ReS2 are discussed relative to the other 2D materials.

Citation H. Jang; C.R. Ryder; J.D. Wood; M.C. Hersam; D.G. Cahill.3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide.. Adv Mater Weinheim. 2017;29(35). doi:10.1002/adma.201700650

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