1. School of Nano Sciences
2. Central University of Gujarat
3. Gandhinagar-382030
4. India
5. Department of Physics and Astronomy
6. Uppsala University
7. Uppsala 75120
8. Sweden
9. Department of Physics
10. Faculty of Science
11. The Maharaja Sayajirao University of Baroda
12. Vadodara-390 002
13. Centre for Applied Chemistry
14. Applied Materials Physics