1. Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Near Bhilai House, Durg, C.G., 491001, India
2. Department of Chemistry, Shri Shankaracharya Vidyalaya Hudco, India
3. School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, C.G., 492010, India