1. Nanomaterials Laboratory, Department of Physics, Alagappa University, Karaikudi 630003, Tamil Nadu, India
2. Electrodics and Electrocatalysis (EEC) Division, CSIR–Central Electrochemical Research Institute (CSIR–CECRI), Karaikudi 630003, Tamil Nadu, India
3. Department of Mechanical Engineering, Lamar University, Beaumont, TX 77710, USA
4. Department of Physics, School of Science and Humanities, Karunya University, Karunya Nagar, Coimbatore 641114, Tamil Nadu, India