Enhancing the Sensitivity of Silver Oxide Sensors to NO₂ Gas by Adding a TFB Polymer
DOI:
https://doi.org/10.31257/2018/JKP/2025/v17.i02.21566Keywords:
TFB-polymer, PLD, NO2 Gas sensorAbstract
In this study, a poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-sec-butylphenyl) diphenylamine))] (TFB) polymer was added to silver oxide (AgO) thin films to increase their sensitivity. The S2 (TFB/AgO) sample demonstrated the highest sensitivity of 172.6% at an operating temperature of 150 °C and the shortest recovery time of 6 s at 25 °C and 200 °C. The composite films showed the biggest change in electrical resistance. Pulsed laser deposition (PLD) was used to deposit AgO thin films on glass and quartz substrates, and spin coating was used to deposit TFB polymer layers to create uniform films. AgO has a polycrystalline cubic structure, and the addition of TFB did not change this crystal structure, according to X-ray diffraction (XRD) analysis, which verified that TFB is amorphous. The TFB/AgO sample displayed dominant AgO absorption in the optical absorption spectra, while the polymer encasing the AgO particles made TFB absorption more noticeable in the TFB:AgO mixed film. Both AgO and TFB were identified by Fourier-transform infrared (FTIR) analysis, which showed distinct absorption peaks with observable shifts and intensity variations in the composite samples. The interaction between TFB and AgO and the creation of altered interfacial bonds are confirmed by these spectral shifts.
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Copyright (c) 2025 zainab ali, Omar Adnan Ibrabim
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