1. Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600 034, India
2. Department of Physics, College of Science, University of Bahrain, PO Box 32038, Manama, Bahrain
3. Department of Physics, Dr. Mahalingam College of Engineering and Technology, Pollachi, Tamil Nadu 642 003, India
4. Department of Mathematics and Science, Faculty of Humanities and Sciences, Prince Sultan University, Riyadh, Saudi Arabia
5. Materials Division, School of Advanced Sciences, Vellore Institute of Technology (VIT), Chennai Campus, Chennai 600 127, India