1. College of Chemistry and Environmental Engineering Shenzhen University Shenzhen Guangdong 518055 China
2. Single Molecule Study Laboratory College of Engineering and Nanoscale Science and Engineering Center University of Georgia Athens GA 30602 USA
3. Department of Chemical and Biomolecular Engineering University of Connecticut Storrs CT 06269 USA
4. Institute of Quantitative Biology Zhejiang University Hangzhou Zhejiang 310027 China
5. Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062 China
6. Department of Chemistry University of South Florida Tampa FL 33620 USA
7. Department of Cell Biology, Microbiology and Molecular Biology University of South Florida Tampa FL 33620 USA
8. Polymer Program Institute of Material Science University of Connecticut Storrs CT 06269 USA