1. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
2. Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
3. Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, California 92521, United States
4. US Army Combat Capabilities Development Command Chemical Biological Center, 8198 Blackhawk Road, Aberdeen Proving Ground, Aberdeen, Maryland 21010, United States