1. Department of Chemistry, University of Illinois at Urbana-Champaign, 505 South
Matthews Avenue, Urbana, Illinois 61801, United States
2. Department of Materials Science and
Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1304 West
Green Street, Urbana, Illinois 61801, United States
3. NanoScience Technology Center and College
of Optics and Photonics (CREOL), University of Central Florida, 12424 Research Parkway Suite 400, Orlando,
Florida 32826, United States