1. Department of Physics and AstronomyUniversity of Nigeria Nsukka Enugu State Nigeria
2. National Center for Physics Islamabad Pakistan
3. NPU‐NCP Joint International Research Center on Advanced Nanomaterials and Defects EngineeringNorthwestern Polytechnical University Xi'an China
4. Nanosciences African Network (NANOAFNET), iThemba LABS, National Research Foundation Somerset West Western Cape South Africa
5. UNESCO‐UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate StudiesUniversity of South Africa (UNISA) Pretoria South Africa
6. Department of PhysicsFederal University of Technology Owerri Imo State Nigeria
7. Faculty of Applied and Natural Sciences, Department of PhysicsCoal City University Enugu Enugu State Nigeria