“Design and Fabrication of Nanostructure TiO2 Doped NiO As A Gas Sensor for NO2 Detection”. Iraqi Journal of Science 62, no. 11 (December 23, 2021): 4385–4396. Accessed May 4, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3955.