1. National Centre for Physics, Quaid-i-Azam University Campus, Islamabad 45320, Pakistan
2. Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721, USA
3. Department of Mining and Geological Engineering, The University of Arizona, Tucson, AZ 85719, USA
4. Department of Plant Sciences, Faculty of Bioscience Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
5. Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia