1. Department of Physics and Astronomy, University of Nigeria Nsukka, Nsukka, Enugu State, Nigeria
2. National Centre for Physics, Quaid-I-Azam University Campus, Islamabad, Pakistan
3. Department of Physics, Michael Okpara University of Agriculture, Umuahia, Nigeria
4. Department of Material Sciences, Addis Ababa University, Ethiopia
5. NPU-NCP Joint International Research Centre on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, China
6. Nanosciences African Network, iThemba LABS-National Research, South Africa D UNESCO, Cape Town, South Africa
7. UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Pretoria, South Africa
8. Africa Centre of Excellence for Sustainable Power and Energy Development, University of Nigeria, Nsukka, Nigeria