1. School of Nano Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur721302, India
2. School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur721302, India
3. Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur721302, India
4. Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur721302, India
5. Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur721302, India