1. Centre of Excellence in Solid State Physics, University of the Punjab, Lahore 54590, Pakistan
2. Department of Zoology, Lahore College for Women University, Jail Road, Lahore 54000, Pakistan
3. Department of Physics, Clarkson University, Potsdam, NY 13699, USA
4. Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK
5. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
6. Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia