1. Department of Chemistry, Faculty of Mathematical and Physical Sciences, M. S. Ramaiah University of Applied Sciences, Bangalore 560058, INDIA
2. Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, INDIA
3. Environmental Science and Engineering, University of Texas at El Paso, 500 W. Univ. Ave., El Paso, Texas 79968, United States
4. Center for Advanced Materials Research, University of Texas at El Paso, 500 W. Univ. Ave., El Paso, Texas 79968, United States
5. Department of Aerospace & Mechanical Engineering, University of Texas at El Paso, 500 W. Univ. Ave., El Paso, Texas 79968, United States