Affiliation: | 1.Department of Physics, Faculty of Science, Centre for Ionics Universiti Malaya, Universiti Malaya, 50603, Kuala Lumpur, Malaysia ;2.Higher Institution Centre of Excellence (HICoE), UM Power Energy Dedicated Advanced Centre (UMPEDAC), Level 4, Wisma R&D, Universiti Malaya, Jalan Pantai Baharu, 59990, Kuala Lumpur, Malaysia ; |