1. Department of Chemistry, School of Science, Institute of Molecular Plus, Tianjin University, Tianjin 300072, China
2. Department of Physics, School of Science, Tianjin University, Tianjin 300072, China
3. Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300072, China