Sarmad Fawzi Hamza Alhasan et al. 2025. Pure and Doped Gallium Nitride-Based Gas Sensor: A Review. International Journal of Nanoelectronics and Materials (IJNeaM) . 18, June (Jul. 2025), 227–240. DOI:https://doi.org/10.58915/ijneam.v18iJune.2358.