[1] School of Applied Physics, Faculty Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor,43600, Malaysia
[2] School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor,43600, Malaysia
[3] Institute of Microengineering and Nanoelectronic (IMEN), Universiti Kebangsaan Malaysia, Bangi, Selangor,43600, Malaysia
[4] Physics Department, Science College, University of Baghdad, Baghdad, Iraq