Basal-plane thermal conductivity of nanocrystalline and amorphized thin germanane
- Univ. of Texas, Austin, TX (United States). Dept. of Mechanical Engineering
- The Ohio State Univ., Columbus, OH (United States); Dept. of Chemistry
- French Atomic and Alternative Energy Commission, Grenoble (France)
- Boston College, Chestnut Hill, MA (United States). Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- The Ohio State Univ., Columbus, OH (United States). Dept. of Mechanical and Aerospace Engineering
Recently, we synthesized Germanane (GeH), a hydrogen-terminated layered germanium structure. We employed a four-probe thermal transport measurement method to obtain the basal-plane thermal conductivity of thin exfoliated GeH flakes and correlated the measurement results with the crystal structure. Furthermore, the obtained thermal conductivity increases with increasing temperature, suggesting that extrinsic grain boundary and defect scattering dominate intrinsic phonon-phonon scattering. Annealing a polycrystalline GeH sample at 195 C caused it to become amorphous, reducing the room-temperature thermal conductivity from 0.53± 0.03 W m-1 K-1, which is close to the value calculated for 3.3 nm grain size, to 0.29± 0.02 W m-1 K-1, which approaches the calculated amorphous limit in the basal plane thermal conductivity.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; FG02-07ER46377
- OSTI ID:
- 1327610
- Alternate ID(s):
- OSTI ID: 1327552
- Journal Information:
- Applied Physics Letters, Vol. 109, Issue 13; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Recent Progress on Germanene and Functionalized Germanene: Preparation, Characterizations, Applications, and Challenges
|
journal | February 2019 |
Tunable gap in stable arsenene nanoribbons opens the door to electronic applications
|
journal | January 2019 |
Identification of turbostratic twisting in germanane
|
journal | January 2019 |
Optoelectronic properties of methyl-terminated germanane
|
journal | July 2019 |
Similar Records
Thickness-Dependent Cross-Plane Thermal Conductivity Measurements of Exfoliated Hexagonal Boron Nitride
Basal-plane thermal conductivity of few-layer molybdenum disulfide