1. Department of Electrical & Electronic Engineering, Woosuk University, Samrye-Eup, Wanju-Gun, Jeonbuk, 565-701, Republic of Korea
2. School of Advanced Materials Science and Engineering, SKKU Advanced
Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology
(HINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea
3. Department of Electrical
Engineering and Institute for Nano Science, Korea University, Seoul 136-701, Republic of Korea
4. IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute, 161 Gajeong-dong, Yuseong, Daejeon, 305-700, Republic of Korea
5. Department
of Advanced Chemical Engineering, Mokwon University, 800 Doan-dong, Seo-gu, Daejeon, 302-729, Republic of Korea
6. Lawrence Livermore National Laboratory, Livermore, California 94551, United States