1. Yusuf Maitama Sule University Kano,Department of Physics,Kano,Nigeria
2. Bayero University Kano,Department of Electrical Engineering,Kano,Nigeria
3. Universiti Putra Malysia,Institute of Nanoscience and Nanotaechnology,Serdang,Malaysia
4. Hafr Al Batin Al Jamiah,Department of Electrical Engineering,Hafr Al Batin,Saudi Arabia