Shehla Honey (Centre of Excellence in Solid State Physics, University of Punjab, QAC, Lahore, Pakistan), Shahzad Naseem (Centre of Excellence in Solid State Physics, University of Punjab, QAC, Lahore, Pakistan), Ishaq Ahmad (National Center for Physics, Quaid-i-Azam University, Islamabad 44000, Pakistan), Force Tefo Thema (UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, P.O. Box 392, Pretoria-South Africa), Malik Maaza (UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk ridge, P.O. Box 392, Pretoria-South Africa)