1. College of Physics and Electronic Information
2. Huaibei Normal University
3. Huaibei 235000
4. P. R. Chnia
5. Research Center for Biomimetic Functional Materials and Sensing Devices
6. Hefei Institute of Intelligent Machines
7. Chinese Academy of Sciences
8. Hefei 230031
9. P. R. China
10. State Key Laboratory of Solidification Processing
11. Center of Nano Energy Materials
12. School of Materials Science and Engineering
13. Northwestern Polytechnical University
14. Xi'an