1. NanoHybrid Technology Research Center; Korea Electrotechnology Research Institute (KERI); Changwon-si, Gyeongsangnam-do 642-120 Republic of Korea
2. Department of Electronics and Computer Engineering; Hanyang University; Seoul 133-791 Republic of Korea
3. Electrical Functional Material Engineering; Korea University of Science and Technology (UST); Changwon-si, Gyeongsangnam-do 642-120 Republic of Korea