1. School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
2. Department of Applied Science & Humanities, Assam University, Silchar 788011, India
3. St Thomas College of Engineering & Technology, Kolkata 700023, India
4. CSIR-Central Glass & Ceramic Research Institute, Kolkata 700032, India
5. Departments of Physics, Jadavpur University, Kolkata 700032, India