1. Department of Physics, College of Science and Technology, Covenant University, P.M.B. 1023, Ota, Ogun State, Nigeria
2. Department of Chemistry, College of Science and Technology, Covenant University, P.M.B. 1023, Ota, Ogun State, Nigeria
3. Faculty of Applied Science and Technology (FAST), Universiti Tun Hussein Onn Malaysia (UTHM), Pagoh Campus, Km 1, Jalan Panchor, Pagoh, Muar, Johor, Malaysia