1. Center for Advanced Materials
2. Qatar University
3. Doha 2713
4. Qatar
5. Division of Nanomaterials and Chemistry
6. Hefei National Laboratory for Physical Sciences at Microscale
7. University of Science and Technology of China
8. Hefei 230026
9. P. R. China
10. Institute of Chemical Sciences
11. Bahauddin Zakaria University
12. Multan 60800
13. Pakistan