1. Nano Convergence Materials Center, Emerging Materials R&D Division, Korea Institute of Ceramic Engineering and Technology (KICET), 101 Soho-ro, Jinju-si 52851, Gyeongsangnam-do, Korea
2. Department of Materials Science and Engineering, Pusan National University, Busan 46241, Korea
3. Department of Electrical and Electronics Engineering, Pusan National University, Busan 46241, Korea