1. KAUST Solar Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
2. Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
3. Department of Chemistry, Zakir Husain Delhi College, University of Delhi, Delhi 110002, India
4. Special Center for Nanoscience, Jawaharlal Nehru University, Delhi 110067, India