1. Department of Physics, University of Engineering and Technology Lahore, Pakistan
2. Laboratoire de Génie Enzymatique et Cellulaire, UMR 6022 CNRS, Université de Technologie de Compiègne, BP 20529, 60205 Compiègne Cedex, France
3. Department of Physics, School of Science, University of Management and Technology, C-11 Johar Town, Lahore 54770, Pakistan