1. Universiti Putra Malaysia, 43400 UPM Serdang,Institute of Nanoscience & Nanotechnology (ION2),Selangor,Malaysia
2. Universiti Putra Malaysia, 43400 UPM Serdang,Faculty of Engineering,Selangor,Malaysia
3. Universiti Putra Malaysia, 43400 UPM Serdang of Organization,Faculty of Engineering,Selangor,Malaysia
4. Bayero Universiti Kano,Department of Electrical Engineering Faculty of Engineering,Kano,Nigeria