1. School of Applied Physics, Faculty of Science and Technology; Universiti Kebangsaan Malaysia; 43600 Bangi Selangor Malaysia
2. Section of Fabrication and Joining; Universiti Kuala Lumpur-Malaysia France Institutes; 43650 Bandar Baru Bangi Selangor Malaysia
3. School of Applied Physics, Faculty of Science and Technology; Islamic Science University of Malaysia; 71800 Bandar Baru Nilai Negeri Sembilan Malaysia