1. Department of Chemistry
2. University of North Bengal
3. Darjeeling-734013
4. India
5. St. Joseph's College
6. Darjeeling-734101
7. Laboratoire des Multimatériaux et Interfaces
8. UMR 5615 CNRS-Université Claude Bernard Lyon 1
9. France
10. Department of Physics
11. Jadavpur University
12. Kolkata-700032