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Abstract— <p>The structural and phase features of the (In,Ga)<sub>2</sub>O<sub>3</sub> solid solution obtained by the sol-gel method were studied using X-ray powder diffraction, IR spectroscopy, and scanning electron microscopy. Single-electrode gas sensors were fabricated, and their sensitivity to gas mixtures containing methane and carbon monoxide was investigated. It was shown that impregnating the sensor with a gold-containing solution leads to a significant increase (by approximately 3–4 times) in the sensor’s sensitivity to carbon monoxide and a slight decrease in its sensitivity to methane. The developed sensors enable the detection of low carbon monoxide concentrations (&lt;1 vol %) with a short response time (~120 s) and recovery time (~5 s). The nature of the sensitivity dependence on CO concentration was established, and an explanation for the observed effects was proposed.</p>

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Effect of Gold Addition on the Sensitivity of Single-Electrode Gas Sensors Based on (In, Ga)2O3 to Carbon Monoxide and Methane

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • I. A. Taratyn,
  • Yu. S. Haiduk,
  • O. G. Reutskaya

摘要

Abstract—

The structural and phase features of the (In,Ga)2O3 solid solution obtained by the sol-gel method were studied using X-ray powder diffraction, IR spectroscopy, and scanning electron microscopy. Single-electrode gas sensors were fabricated, and their sensitivity to gas mixtures containing methane and carbon monoxide was investigated. It was shown that impregnating the sensor with a gold-containing solution leads to a significant increase (by approximately 3–4 times) in the sensor’s sensitivity to carbon monoxide and a slight decrease in its sensitivity to methane. The developed sensors enable the detection of low carbon monoxide concentrations (<1 vol %) with a short response time (~120 s) and recovery time (~5 s). The nature of the sensitivity dependence on CO concentration was established, and an explanation for the observed effects was proposed.