Real-Time Miniature Sensor Developed to Improve Toxic Gas Detection

UNSW Sydney researchers have developed a new miniature nitrogen dioxide (NO₂) sensor which operates in real-time and does not require an external power source.

The new sensor, published in Advanced Science, demonstrated high NO₂ sensitivity while operating at room temperature during testing. Additionally, by using advanced printing techniques, the miniature sensors can be sustainably produced.

"It's exciting because it's not just science for the sake of science—this has great potential to apply to practical uses," said Professor Dewei Chu. "The fact that it's sustainable and has shown excellent performance makes it feel like we're contributing to revolutionizing gas sensors that can be implemented in wearable sensing applications and large-scale production."

Lab testing of the MoS₂-based sensor showed and excellent NO₂ sensitivity of just 10ppm. NO₂, while naturally found in small concentrations, is considered a danger to human life beginning at concentrations as low as 50ppm.