1. PG & Research, Department of Physics, Sree Sevugan Annamalai College, Devakottai 630 303, Tamil Nadu, India
2. Department of Physics, Alagappa University, Karaikudi 630003, Tamil Nadu, India
3. CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamil Nadu, India
4. Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi 630003, India