1. School of Chemistry and Resource Engineering, Honghe University, Mengzi, Yunnan 661199, China
2. Department of Materials Science and Engineering, Cornell University, Ithaca, New York450850, United States
3. Faculty of Applied Sciences, Simon Fraser University, MSE 4176, 250-13450 102nd Ave, Surrey, BC V3T 0A3 Canada
4. College of Remote Sensing and Geophysics, Al-Karkh University of Science, Baghdad 10011, Iraq
5. Department of Physics, Iran University of Science and Technology, P.O. Box, Tehran 16846-13114, Iran
6. Department of Physics, Faculty of Science, University of Isfahan, Isfahan 81746-73441, Iran