1. Nanoionics and Energy Storage Laboratory (NanoESL) Department of Physics and Material Science Madan Mohan Malaviya University of Technology Gorakhpur (U. P.) India
2. Department of Chemical and Environmental Science Madan Mohan Malaviya University of Technology Gorakhpur (U. P.) India
3. Department of Physics School of Physical & Decision Sciences Nanomaterials and Sensors Research Laboratory Babasaheb Bhimrao Ambedkar University Lucknow (U.P) India