1. Centre for Advanced Materials Research (CMR), University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79968, United States
2. Environmental Science and Engineering, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79968, United States
3. Department of Electrical and Computer Engineering, Petersen Institute of NanoScience and Engineering, University of Pittsburg, Pittsburgh, Pennsylvania 15261, United States
4. Environmental Molecular Sciences Laboratory (EMSL), Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
5. Department of Mechanical Engineering, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79968, United States