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.
| Original language | English (US) |
|---|---|
| Journal | Advanced Materials |
| DOIs | |
| State | Accepted/In press - 2017 |
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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: Contribution to journal › Article
}
TY - JOUR
T1 - 3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide
AU - Jang,Hyejin
AU - Ryder,Christopher R.
AU - Wood,Joshua D.
AU - Hersam,Mark C.
AU - Cahill,David G.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - 2D materials
KW - ReS
KW - Rhenium disulfide
KW - TDTR
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=85025100812&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85025100812&partnerID=8YFLogxK
U2 - 10.1002/adma.201700650
DO - 10.1002/adma.201700650
M3 - Article
JO - Advanced Materials
T2 - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
ER -