1. Department of Physics, The Women University, Multan, Pakistan
2. Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
3. Department of Physics, CAMD and Center for Nanostructured Graphene (CNG), Technical University of Denmark, Lyngby, Denmark
4. Khawaja Fareed university of engineering and information technology, Rahim Yar Khan, Pakistan