1. Synchrotron-Light for Experimental Science and Applications in the Middle East (SESAME) P. O. Box 7, Allan 19252, Jordan
2. Nanosciences and Technology Division, National Centre for Physics, QAU Campus, Shahdra Valley Road, P. O. Box 2141, Islamabad 44000, Pakistan
3. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
4. Experimental Physics Department, National Centre for Physics, QAU Campus, Shahdra Valley Road, P. O. Box 2141, Islamabad 44000, Pakistan
5. U.S.−Pakistan Center for Advanced Studies in Energy, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan