Young's modulus and corresponding orientation in β-Ga2O3 thin films resolved by nanomechanical resonators
Abstract
We report on the nondestructive measurement of Young's modulus of thin-film single crystal beta gallium oxide (β-Ga2O3) out of its nanoscale mechanical structures by measuring their fundamental mode resonance frequencies. From the measurements, we extract the Young's modulus in the (100) plane, EY,(100) = 261.4 ± 20.6 GPa, for β-Ga2O3 nanoflakes synthesized by low-pressure chemical vapor deposition (LPCVD), and in the [010] direction, EY,[010] = 245.8 ± 9.2 GPa, for β-Ga2O3 nanobelts mechanically cleaved from bulk β-Ga2O3 crystal grown by the edge-defined film-fed growth (EFG) method. The Young's moduli extracted directly on nanomechanical resonant device platforms are comparable to theoretical values from first-principle calculations and experimentally extracted values from bulk crystal. This study yields important quantitative nanomechanical properties of β-Ga2O3 crystals and helps pave the way for further engineering of β-Ga2O3 micro/nanoelectromechanical systems (M/NEMS) and transducers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 05, 2021
- Source ID
- 10.1063/5.0050421
Entities
People
- Hongping Zhao
- Philip X-L Feng
- Xu-Qian Zheng
- Xutang Tao
- Zhitai Jia
Organizations
- Defense Threat Reduction Agency
- Ministry of Education of the People's Republic of China
- Ministry of Science and Technology of the People's Republic of China
- National Science Foundation
- Ohio State University
- Shandong University
- University of Florida