1. Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria
2. National Centre for Physics, Quaid-i-Azam University campus, Islamabad, Pakistan
3. Nanosciences African Network, iThemba LABS-National Research, South Africa
4. UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies, University of South Africa, Pretoria, South Africa
5. NPU-NCP Joint International Research Centre on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi’an, China
6. Department of Physics, University of Delta, Agbor, Nigeria
7. Department of applied Sciences and Dental therapy, Federal college of Dental technology and therapy Enugu, South Africa
8. Africa Centre of Excellence for sustainable Power and Energy Development, University of Nigeria, Nsukka, Nigeria