1. Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
2. Department of Physics, University of Miami, 1320 Campo Sano Drive, Coral Gables, Florida 33146, United States
3. Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
4. Dr. J. T. Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, UM Life Science Technology Building, 1951 NW Seventh Ave, Suite 475, Miami, Florida 33136, United States