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

초록

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 degrees C, 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.

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