1. Department of Chemistry, Aliah University, New Town, Kolkata 700 156, India
2. Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, India
3. Academy of Scientific and Innovative Research, CSIR-CMERI Campus, Durgapur 713209, India
4. Department of Physics, Jadavpur University, Jadavpur, Kolkata 700 032, India
5. Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700106, India
6. Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700 032, India