1. Department of Chemical and Biomolecular Engineering, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
2. Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, Houston, Texas 77005, United States
3. Department of Environmental Engineering, Rice University, Houston, Texas 77005, United States
4. Department of Chemistry, Rice University, Houston, Texas 77005, United States
5. Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States