1. Faculty of Applied Sciences, Universiti Teknologi MARA, Kampus Kuala Terengganu, 21080 Kuala Terengganu, Malaysia
2. School of Physics, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
3. Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Malaysia