1. U.S.-Pakistan Centre for Advanced Studies in Energy, NUST; Sector H-12 44000 Islamabad Pakistan
2. School of Chemical and Materials Engineering, NUST; Sector H-12 44000 Islamabad Pakistan
3. Quaid-i-Azam, University; Department of Chemistry; 45320 Islamabad Pakistan
4. School of Natural Sciences, NUST; Sector H-12 44000 Islamabad Pakistan