1. Extreme Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea
2. Division of Nano & Information Technology at KIST School, University of Science and Technology (UST), Daejeon 34113, South Korea
3. Department of Chemical Engineering, Kyung Hee University, Yongin 17104, South Korea
4. Department of Physics & Chemistry, Korea Military Academy (KMA), Seoul 01805, South Korea