Ultra high-sensitive, prompt response and recovering Pt/(Pt+SiO ) cermet layer/GaN-based hydrogen sensor for life-saving applications.

In this work, we report an ultra-high sensitive (S = 1.4 × 10%), prompt response and recovering Pt/Pt+SiO cermet layer/GaN-based hydrogen (H) sensor. A sensor fabricated with a 15 nm cermet layer, comprising Pt and SiO, deposited between 15 nm Pt and GaN layers, exhibits significantly enhanced sensitivity in the detection of 4 %H by ≈ 300×, as compared to the reference Pt/GaN sensor at ambient temperature (300 K).