Proceedings of International Conference on Applied Innovation in IT
2026/03/31, Volume 14, Issue 1, pp.423-431

Data-Driven Gas Sensing Analysis of Copper Sulfide Films Modified with Manganese


Hayim Ch. Magid, Muna Ahmed Issa, Hanaa Kadem Essa, Wathiq Ayoub Taha Al Ramdhan and Hadi Ahmed Hussin


Abstract: Cu₂S: Mn thin films were effectively prepared employing the plasma jet technique. The XRD patterns show a hexagonal structure. The particle size of all the films was revealed using an atomic force microscope (AFM) as spherically shaped grains of uniform size, tightly packed together. SEM images reveal Cu2S: Mn nanostructures with crystallite nanorods. Plasma exposure time correlates with particle size (103-154.15 nm). Visible absorption spectra assure low absorption between 500 and 750 nm, revealing the film's excellent visibility in this range. The energy gap decreased from 2.57 eV (4 min) to 2.45 eV (12 min). The refractive index of Cu₂S films increases with increasing plasma exposure time. Cu2S: Mn nanostructures, treated for 4, 8, and 12 minutes, showed varied resistance to NO2 at 125°C, with the film treated for 4 minutes exhibiting the lowest resistance. Sensitivity of Cu2S: Mn films to NO2 decreases with increasing plasma exposure time, dropping notably at 450 ppm.

Keywords: Cu2S: Mn, Thin Films, Plasma Jet, Nanostructure, Physical Properties.

DOI: Under indexing

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