1. Department of Applied Sciences, N.I.T. Goa, 403401, India
2. Nanosensor Research Laboratory, Department of Physics, CMR Technical Campus, Kandlakoya, Medchal-501401, Hyderabad, Telangana, India
3. Department of Physics, Sreenidhi University, Ghatkesar, Hyderabad, Telangana-501301, India