1. Department of Chemistry and Physics
2. Fayetteville State University
3. Fayetteville
4. USA
5. College of Materials Science and Engineering
6. Kunming University of Science and Technology
7. Kunming 650093
8. P. R. China
9. Centre for Nanoscale Materials
10. Argonne National Laboratory
11. Argonne
12. Illinois 60439
13. Oak Ridge Institute for Science and Education
14. Oak Ridge Associated Universities
15. Oak Ridge