1. Chemistry Department Fatima Jinnah women University, The Mall, Rawalpindi, 46000, Pakistan
2. Chemistry Department Quaid-i-Azam University Islamabad, 45320, Pakistan
3. School of Physics & Astronomy Yunnan University Kunming, 650091, China
4. Nanoscience and Technology Department, National Centre for Physics, Islamabad, Pakistan
5. Department of physics, Kohsar University, Murree, 47150, Pakistan