Achieving Room-Temperature ppb-Level H₂S Detection in a Au-SnO₂ Sensor with Low Voltage Enhancement Effect.

ABSTRACT: Although semiconductor metal oxide-based sensors are promising for gas sensing, low-power and room temperature operation (24 ± 1 °C) remains desirable for practical applications particularly considering the request of energy saving or net zero emission. In this study, we demonstrate a Au/SnO₂-based ultrasensitive H₂S gas sensor with a limit of detection (LOD) of 2 ppb, operating at very low voltages (0.05 to 0.5 V) at room temperature. The Au/SnO₂-based sensor showed approximately 7 times higher response (the ratio of change in the current to initial current) of ∼270% and 4 times faster recovery (126 s) compared to the pure SnO₂-based sensor when exposed to 500 ppb H₂S gas concentration at 0.5 V operating voltage at relative humidity (

SUBMITTER: Deb M 

PROVIDER: S-EPMC11443527 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature