1. Department of Chemistry
2. University of Malakand
3. Pakistan
4. CAS Key Laboratory of Nano Systems and Hierarchical Fabrication
5. CAS Center for Excellence in Nanoscience
6. University of Chinese Academy of Sciences
7. Beijing 100049
8. P. R. China
9. CAS Key Laboratory of Standardization and Measurement for Nanotechnology
10. National Center for Nanoscience and Technology
11. Beijing 100190