1. Department of Biochemistry
2. Ballygunge Science College
3. University of Calcutta
4. Kolkata 700 019
5. India
6. Department of Chemical
7. Biological & Macromolecular Sciences
8. S. N. Bose National Centre for Basic Sciences
9. Kolkata 700106
10. Institute for Condensed Matter Physics
11. 38106 Braunschweig
12. Germany
13. Laboratory for Emerging Nanometrology