1. Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, 01000 Kangar, Perlis, Malaysia
2. Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
3. Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
4. Université de Lorraine, CNRS, IJL, F-54000 Nancy, France
5. Institute of Nano Optoelectronics Research and Technology, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia