1. Department of Chemical and Biomolecular Engineering; Yonsei University; 50 Yonsei-ro Seodaemun-gu Seoul 120-749 Republic of Korea
2. National Creative Research Initiative; Center for Smart Molecular Memory; Department of Chemistry; Energy Science and SAINT; Sungkyunkwan University; 2066 Seoburo, Jangan-Gu, Suwon Gyeonggi-Do 440-746 Republic of Korea
3. Department of Physics; Anhui Normal University; Anhui Wuhu 241000 P. R. China
4. SKKU Advanced Institute of Nanotechnology; Sungkyunkwan University; Suwon 440-746 Republic of Korea
5. School of Chemical Engineering; Sungkyunkwan University; Suwon 440-746 Republic of Korea