1. Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon-si, Gyeongsangnam-do 51543, 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 51543, Republic of Korea
4. Department of Electronic Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea
5. Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China