1. School of Pure and Applied Physics
2. Mahatma Gandhi University
3. Kottayam
4. India
5. Department of Physics
6. St. Teresa's College
7. Ernakulum
8. International and Inter University Centre for Nanoscience and Nanotechnology
9. Institut Jean Lamour-UMR CNRS 7198
10. Facult'e des Sciences et Techniques
11. Vandoeuvre-les-Nancy Cedex
12. France
13. Amal Jyothi College of Engineering
14. Pondicherry University
15. Pondicherry