1. Department of Advanced Materials Science
2. Faculty of Engineering
3. Kagawa University
4. Takamatsu-shi
5. 761-0396 Japan
6. College of Chemistry and Chemical Engineering
7. Baoji University of Arts and Sciences
8. Baoji
9. 721013 P. R. China
10. School of Materials Science and Engineering
11. Shaanxi University of Science and Technology
12. Xi'an
13. 710021 PR China