1. Department of Materials Science and Engineering
2. Feng Chia University
3. Taichung 407
4. Taiwan
5. Research Center of Applied Science
6. Academia Sinica
7. Taipei 115
8. National Synchrotron Radiation Research Center
9. Hsinchu 30076
10. Department of Electrical Engineering
11. University of Southern California
12. Los Angeles
13. USA