1. Department of Physics & Astronomy University of Nigeria Nsukka Nigeria
2. Department of Chemical Engineering Federal University of Technology Owerri Nigeria
3. African Centre of Excellence in Future Energies and Electrochemical Systems (ACE‐FUELS), Federal University of Technology Owerri Nigeria
4. Department of Physics and Astronomy University of Western Ontario London Canada
5. Nanosciences African Network (NANOAFNET) iThemba LABS‐National Research Foundation Somerset West South Africa
6. UNESCO‐UNISA Africa Chair in Nanosciences/Nanotechnology College of Graduate Studies, University of South Africa (UNISA) Pretoria South Africa