1. Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
2. Department of Chemistry, U.S. Naval Academy, 572M Holloway Road, Annapolis, Maryland 21402, United States
3. Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
4. Department of Materials Science and Engineering, Tuskegee University, 1200 West Montgomery Road, Tuskegee, Alabama 36088, United States