3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide

Hyejin Jang, Christopher R. Ryder, Joshua D. Wood, Mark C. Hersam, David G. Cahill

Research output: Research - peer-reviewArticle

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.

LanguageEnglish (US)
JournalAdvanced Materials
DOIs
StateAccepted/In press - 2017

Fingerprint

Rhenium
Disulfides
Thermal conductivity
Direction compound
Crystalline materials
Crystal orientation
Raman spectroscopy
Anisotropy
Temperature
Hot Temperature

Keywords

  • 2D materials
  • ReS
  • Rhenium disulfide
  • TDTR
  • Thermal conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide. / Jang, Hyejin; Ryder, Christopher R.; Wood, Joshua D.; Hersam, Mark C.; Cahill, David G.

In: Advanced Materials, 2017.

Research output: Research - peer-reviewArticle

Jang, Hyejin ; Ryder, Christopher R. ; Wood, Joshua D. ; Hersam, Mark C. ; Cahill, David G./ 3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide. In: Advanced Materials. 2017
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