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<p>In this work, a facile fabrication of ZnO-Ag hybrid gas sensors on laser-patterned FTO electrodes is demonstrated. Interdigitated electrodes are defined by nanosecond laser ablation, eliminating photolithography. ZnO films are spin-coated, and Ag nanoparticles are photoreduced under UV irradiation, where extended exposure transforms particles into plate-like structures with increased surface area. The ZnO–Ag(240) sensor shows good H<sub>2</sub>S sensing performance at 200℃, with rapid response/recovery (T<sub>Res</sub>: 10.7&#xa0;s/T<sub>Rec</sub>: 193.5&#xa0;s), high linearity (R<sup>2</sup> = 0.992), and strong selectivity toward H₂S over other gases.</p> Graphic Abstract <p></p>

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Facile fabrication of ZnO-Ag gas sensors on laser-patterned FTO for enhanced H2S detection

  • 期刊论文

  • 发表日期：

    2025年11月23日

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  • Kee-Ryung Park,
  • Habeom Lee,
  • Sukjoon Hong,
  • Junyeob Yeo,
  • Hyeunseok Choi,
  • Jinhyeong Kwon

摘要

In this work, a facile fabrication of ZnO-Ag hybrid gas sensors on laser-patterned FTO electrodes is demonstrated. Interdigitated electrodes are defined by nanosecond laser ablation, eliminating photolithography. ZnO films are spin-coated, and Ag nanoparticles are photoreduced under UV irradiation, where extended exposure transforms particles into plate-like structures with increased surface area. The ZnO–Ag(240) sensor shows good H2S sensing performance at 200℃, with rapid response/recovery (TRes: 10.7 s/TRec: 193.5 s), high linearity (R2 = 0.992), and strong selectivity toward H₂S over other gases.

Graphic Abstract