1. Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, United States
2. Department of Physics, Jazan University, Jazan 45142, Saudi Arabia
3. Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
4. Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
5. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
6. Department of Material Science and Engineering, University of California, Irvine, California 92697, United States