Institution: | 1. Department of Physics and Astronomy, Seoul National University, Seoul, Korea;2. Department of Chemistry and the Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, TX, USA;3. School of Material Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea;4. Department of Applied Physics, Kyung Hee University, Yongin‐si, Gyeonggi‐do, Korea |