1. Department of Physics, Saha’s Spectroscopy Laboratory, University of Allahabad, Prayagraj, India
2. Department of Environmental Sciences, Dr. Harisingh Gour Vishwavidyalaya, Sagar, India
3. Centre for Environmental Science, IIDS, University of Allahabad, Prayagraj, India
4. Centre for Material Sciences, IIDS, University of Allahabad, Prayagraj, India
5. National Academy of Sciences, Prayagraj, India
6. School of Basic and Applied Sciences, G. D. Goenka University, Gurugram, India