1. Department of Physics, Faculty of Science, Universiti Putra Malaysia, UPM, Serdang, Selangor, Malaysia
2. Nanomaterials Synthesis and Characterization Laboratory, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, UPM, Serdang, Selangor, Malaysia
3. Ceramic and Amorphous Group (CerAm), Faculty of Applied Sciences and Technology, Pagoh Higher Education Hub, Universiti Tun Hussein Onn Malaysia, Panchor, Johor, Malaysia