1. College of Mechanics and Materials
2. Hohai University
3. Nanjing 210098
4. P. R. China
5. National Laboratory of Solid State Microstructures
6. Jiangsu Collaborative Innovation Center of Advanced Micro/Nano Materials & Equipment
7. Department of Physics
8. Ecomaterials and Renewable Energy Research Center (ERERC)
9. College of Engineering and Applied Sciences
10. Nanjing University