1. Department of Physics, Kongunadu Arts and Science College, Coimbatore – 641 029, India
2. PG Department of Physics, G.T.N. Arts College, Dindigul 624 005, India
3. Department of Physics, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641 020, India
4. Department of Physics, Government College of Technology, Coimbatore 641 013, India
5. Center for Nanomaterial & Energy Devices, Swami Ramanand Teerth Marathwada University, Dnyanteerth, Vishnupuri, Nanded 431606, India
6. Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK
7. Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran