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A New Ethanol Gas Sensor Produced by an Indium Zinc Oxide Layer and Bimetallic Nanoparticles
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DOI：10.1109/ted.2026.3706258.png)
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Abstract
En 中文
A new ethanol (C<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>H<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub>OH) gas sensor, based on the synthesis of an indium zinc oxide (IZO) thin film and bimetallic nanoparticles (NPs), is fabricated and studied. The sputtered IZO thin film is sandwiched between upper gold (Au) NPs and lower silver (Ag) NPs. The incorporation of Ag NPs significantly increases the surface roughness, while Au NPs improve the catalytic activity, resulting in a remarkable enhancement in ethanol sensing performance. The experimental results indicate that, under 1000-ppm C<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>H<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub>OH/air gas, the studied Au NP/IZO/Ag NP sensor achieves an excellent sensing response S<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">R</sub> of 1291 along with a fast response time of 27 s and a recovery time of 8 s at <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$275~^{\circ }$ </tex-math></inline-formula>C. Notably, at <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$275~^{\circ }$ </tex-math></inline-formula>C, the sensor can detect ethanol concentrations as low as 10-ppb C<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub>H<sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub>OH/air. In addition, the sensor demonstrates exceptional selectivity, reproducibility, resistance to humidity, and long-term (90 d) durability toward ethanol gas. Therefore, the proposed Au NP/IZO/Ag NP sensor is a promising candidate for ethanol detection applications.
Keywords:
Ag
Au
ethanol sensor
indium zinc oxide (IZO)
nanoparticle (NP)
sensing response (SR)
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3.2
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685
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3.7W
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