1. School of Pure and Applied Physics
2. Mahatma Gandhi University
3. Kottayam
4. India-686 560
5. Department of Physics
6. St. Teresa's College
7. Ernakulum
8. India-682 011
9. International and Inter University Centre for Nanoscience and Nanotechnology
10. Amal Jyothi College of Engineering
11. India-686518
12. Institut Jean Lamour-UMR CNRS 7198
13. Faculté des Sciences et Techniques
14. Vandoeuvre-les-Nancy Cedex
15. France
16. Pondicherry University
17. Kalapet
18. India-605014