1. Department
of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea
2. Department
of Physics, Jilin University, Changchun, Province of Jilin China
3. Department
of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
4. SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
5. SEMATECH, 257 Fuller Road, Suite 2200, Albany, New York 12203, United States