1. Department of Physics, Jadavpur University, Kolkata 700032, India
2. Department of Physics, Jogamaya Devi College, Kolkata 700026, India
3. Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application, Shenzhen Key Laboratory of Flexible Printed Electronics Technology, and School of Science, Harbin Institute of Technology, Shenzhen 518055, China
4. Department of Environmental Science, Netaji Nagar College for Women, Kolkata 700092, India