1. Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
2. Physics Division, Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia
3. Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, Sabah, Malaysia
4. Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
5. Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
6. Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia