1. Faculty of Science and Mathematics, Department of Chemistry, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
2. Faculty of Science and Mathematics, Nanotechnology Research Centre, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
3. Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
4. Faculty of Science and Mathematics, Department of Physics, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia
5. Pusat Pengajian Sains Asas, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia