1. Applied Chemistry Department, Faculty of Technology & Engineering, The Maharaja Sayajirao University of Baroda, Vadodara-390 001, Gujarat, India
2. Department of Applied Physics, Faculty of Technology & Engineering, The Maharaja Sayajirao University of Baroda, Vadodara-390 001, Gujarat, India
3. Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390 001, Gujarat, India