1. Department of Physics, Allama Iqbal Open University, Islamabad, 44000, Pakistan
2. Department of Physics, Hafiz Hayat Campus, University of Gujrat, Gujrat, 50700, Pakistan
3. Department of Chemistry, School of Physical and Chemical Sciences, Mile End Road, London, Queen Mary University of, London, E1 4NS, UK
4. Digital Environment Research Institute, Queen Mary University of London, Empire House, 67-75 New Road, London, E1 1HH, UK