1. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea, Department of Electrical Engineering and Institute for Nano Science, Korea University, Seoul 136-701, Republic of Korea, IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-350, Republic of Korea, Department of Advanced Nano Materials for Information Technology, Kumoh National Institute of Technology, Gumi, Gyeongbuk 730-701,...