1. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
2. Nanosciences and Technology Division, National Centre for Physics, QAU Campus, Shahdra Valley Road, P.O. Box 2141, Islamabad-44000, Pakistan
3. Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), P.O. Box 7, Allan 19252, Jordan
4. School of Natural Sciences, National University of Sciences and Technology (NUST), H-12, Islamabad, Pakistan
5. Lahore University of Management Sciences DHA, Lahore Cantt, 54792, Pakistan