1. School of Materials Engineering; Universiti Malaysia Perlis (UniMAP), Kompleks Pengajian Jejawi 2; 02600 Jejawi Perlis Malaysia
2. Electronics Materials Research Group, Centre of Excellent for Frontier Material Research; Universiti Malaysia Perlis, No. 66 (Tingkat Atas), Taman Pertiwi Indah, Seriab; 01000 Kangar Perlis Malaysia