1. Department of Physics, Indian Institute of Technology (BHU), Varanasi, India
2. Department of Physics, Institute of Sciences, Banaras Hindu University, Varanasi, India
3. Nanobiotech Lab Kirori Mal College University of Delhi, 110007, Delhi, India
4. Department of Physics, Punjab Engineering College (Deemed to be University), Chandigarh, India
5. IoE Fellow, Delhi School of Public Health, Institution of Eminence, University of Delhi, Delhi 110007, India