Nurbahirah Norddin, Suhaidi Shafie, Muhammad Idzdihar Idris, Xinzhi Liu, Ismail Lawal, and Mohd Nizar Hamidon. 2026. “Utilisation of Response Surface Methodology to Optimise Bandgap and Resistance of Nickel Oxide Using The Sol-Gel Method”. Journal of Engineering Technology and Applied Physics 8 (2):32-40. https://doi.org/10.33093/jetap.2026.8.2.5.