1. Department of Physics University of Wah Wah Cantonment 47040 Pakistan
2. Ministry‐of‐Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering Hubei University Wuhan 430062 P. R. China
3. E.R.C . Research Centre COMSATS University Islamabad Lahore 54000 Pakistan
4. Department of Biosciences University of Wah Wah Cantonment 47040 Pakistan
5. Department of chemistry University of Engineering & Technology Lahore 54000 Lahore Pakistan