1. College of Science
2. Guilin University of Technology
3. Guilin 541004
4. P. R. China
5. Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology
6. MIIT Key Laboratory of Advanced Display Materials and Devices
7. School of Materials Science and Engineering
8. Nanjing University of Science and Technology
9. Nanjing 210094
10. MOE Key Laboratory of New Processing Technology for Nonferrous Metal & Materials