a
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-744, Republic of Korea
E-mail: younskim@snu.ac.kr
;
Fax: +82-31-888-9148
;
Tel: +82-31-888-9143
b
Advanced Institutes of Convergence Technology, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Republic of Korea