Mo-CHS-12 - Room-temperature Drift Reduction in Chemoresistive Gas Sensors by UV Illumination Tuning

Event

EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich

Band

Poster

Chapter

Chemical Sensors

Author(s)

P. Pellegrino, A. Romano Rodriguez - University of Barcelona (UB),Barcelona (Spain), G. Domènech-Gil - Linköping University,Linköping (Sweden)

Pages

412 - 413

DOI

10.5162/eurosensors2026/Mo-CHS-12

ISBN

978-3-910600-12-6

Price

free

Abstract

Chemoresistive metal-oxide gas sensors are attractive for low-cost sensing but typically require elevated temperatures to operate and suffer from baseline drift that degrades long-term accuracy. We report a room-temperature strategy to mitigate drift by illuminating site-selectively grown tin oxide (SnO 2 ) nanowire (NW) assemblies with ultraviolet (UV) light. By choosing the illumination wavelength and tuning the light intensity, the nanowire electrical behavior transitions from semiconducting to metallic, and gasresponse magnitude and speed can be adjusted, while the baseline slope is reduced 3 orders of magnitude. The approach aims at reducing the need of frequent recalibration against external reference instruments for practical deployments.