1. The Wallace H. Coulter Department
of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United
States
2. Education Ministry
Key Laboratory
on Luminescence and Real-Time Analysis, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing
400715, P. R. China
3. School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332,
United States
4. School of Chemical
and Biomolecular
Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States