1. The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
2. Institute
of Chemistry, São Paulo State University-UNESP, C P 355, 14801-970 Araraquara, Brazil
3. School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
4. Materials
Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
5. Laboratory
of Optical Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, People’s Republic of China
6. Departamento
de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, Brazil