1. College of Chemistry and Chemical Engineering
2. Guangxi University for Nationalities
3. Nanning 530006
4. P. R. China
5. Department Chemistry and Centre for Plastic Electronics
6. Imperial College London
7. London SW7 2AZ
8. UK
9. King Abdullah University of Science and Technology (KAUST)
10. Division of Physical Sciences and Engineering
11. Thuwal 23955-6900
12. Saudi Arabia