1. Institute of Applied Physics and Materials Engineering
2. University of Macau
3. Macao SAR
4. P. R. China
5. Department of Electromechanical Engineering
6. Department of Physics
7. Shenzhen Key Laboratory of Hydrogen Energy
8. Southern University of Science and Technology
9. Shenzhen
10. China
11. Department of Materials Science and Engineering
12. Shenzhen 518055