1. Department of PG Studies and Research in Physics, Government Science College, Chitradurga, India
2. Department of Physics, College of Science, Engineering & Technology (CSET), University of South Africa (UNISA), Johannesburg, South Africa
3. Department of Physics, SJM College of Arts, Science and Commerce, Chitradurga, India
4. International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, India