1. Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Republic of Korea
2. Department of Advanced Materials and Science Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
3. Electronics & Telecommunications Research Institute (ETRI), Daejeon 34129, Republic of Korea
4. Creative Research Institute (CRI), Sungkyunkwan University, Suwon 440-746, Republic of Korea
5. Institute of Quantum Biophysics, Sungkyunkwan University, Suwon 440-746, Republic of Korea