1. Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, United States
2. Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), El Paso, Texas 79968, United States
3. Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 770052, United States