1. Department of Applied Science and Humanities, Faculty of Engineering and Technology, Khwaja Moinuddin Chishti Language University, Lucknow, India
2. Saha’s Spectroscopy Laboratory, Department of Physics, University of Allahabad, Allahabad, India
3. Centre for Environmental Science, IIDS, University of Allahabad, Allahabad, India
4. Centre for Material Science, IIDS, University of Allahabad, Allahabad, India
5. School of Basic and Applied Sciences, G D Goenka University, Gurugram, Haryana, India