1. School of Pure and Applied Physics Mahatma Gandhi University Kottayam Kerala India
2. Department of Physics Catholicate College Pathanamthitta Kerala India
3. International and Inter University Centre for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam Kerala India
4. School of Energy Materials Mahatma Gandhi University Kottayam Kerala India
5. UGC‐DAE Consortium for Scientific Research Kolkata Centre Kolkata West Bengal India
6. School of Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam Kerala India