1. Department of Physics
2. College of Science
3. University of Bahrain
4. Kingdom of Bahrain
5. Faculty of Science
6. University 20 Août 1955 of Skikda
7. Skikda 2100
8. Algeria
9. Laboratory of Surfaces and Interfaces (LESIMS)
10. University Badji Mokhtar
11. Annaba
12. Center of Research Excellence in Nanotechnology (CENT)
13. King Fahd University of Petroleum and Minerals
14. Dhahran
15. Saudi Arabia
16. School of Materials Science and Engineering
17. Harbin Institute of Technology at Weihai
18. Weihai 264209
19. China
20. Key Laboratory of Materials Physics
21. Anhui Key Laboratory of Nanomaterials and Technology
22. Center for Environmental and Energy Nanomaterials
23. Institute of Solid State Physics
24. Chinese Academy of Sciences