Mo-CHS-10 - Sub-ppm Methane Sensing by Spark-Ablation-Synthesized Nano-SnO₂

Event

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

Band

Poster

Chapter

Chemical Sensors

Author(s)

D. Gounaris, G. Biskos - The Cyprus Institute,Nicosia (Cyprus), A. Baut, H. Shin, S. E. Pratsinis, A. Güntner - ETH Zürich,Zürich (Switzerland)

Pages

408 - 409

DOI

10.5162/eurosensors2026/Mo-CHS-10

ISBN

978-3-910600-12-6

Price

free

Abstract

We present a scalable spark ablation method for producing Sn nanoparticles at atmospheric pressure, followed by air annealing to form SnO 2 . Structural characterization confirms nanocrystalline particles, while XPS reveals a high fraction of adsorbed oxygen species. The resulting sensor detects methane down to 0.2 ppm with strong, repeatable responses and high humidity stability. This performance is attributed to the high surface area and enhanced surface reactivity identified by XPS. Overall, our results demonstrate that spark ablation provides a promising route for reliable low-level methane sensors.