1. Nanomaterials Laboratory, Department of Physics, Alagappa University, Karaikudi 630003, Tamil Nadu, India
2. Department of Organic Materials and Fiber Engineering, Chonbuk National University, Jeonju-561 756, South Korea
3. Electrodics and Electrocatalysis (EEC) Division, CSIR–Central Electrochemical Research Institute (CSIR–CECRI), Karaikudi 630003, Tamil Nadu, India
4. Department of Physics, School of Science and Humanities, Karunya University, Karunya Nagar, Coimbatore 641114, Tamil Nadu, India