1. Universiti Kuala Lumpur, Malaysian Institute of Industrial Technology (MITEC), Persiaran Sinaran Ilmu, Bandar Seri Alam, Johor 81750, Malaysia
2. Department of Applied Sciences, Universiti Teknologi MARA (UiTM), Permatang Pauh 13500, Penang, Malaysia
3. Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, USM 11800, Pulau Pinang, Malaysia