1. Department of Chemistry, University, of Georgia, Athens, Georgia 30602, United States
2. Department of Physics, University of Georgia, Athens, Georgia 30602, United States
3. National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20852, United States
4. Key Laboratory of Molecular Vaccinology and Molecular Diagnostics & Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen, 361102, China
5. Department of Biochemistry and Complex Carbohydrate Research Center (CCRC), University of Georgia, Athens, Georgia 30602, United States
6. Bio-Imaging Research Center (BIRC), University of Georgia, Athens, Georgia 30602, United States