1. Center for Research at Bio/Nano Interface, Department of Chemistry and Department of Physiology and Functional Genomics Shands Cancer Center UF Genetics Institute and McKnight Brain Institute; University of Florida; Gainesville FL 32611-7200 USA
2. Ministry of Education Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering College of Pharmaceutical Science; Southwest University; Chongqing 400715 China
3. Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Chemistry and Molecular Medicine; Hunan University; Changsha 410082 China