Mo-CHS-05 - Engineering the Active Layer of SnO2 Chemoresistive Sensors: Influence of Deposition Methods and Film Thickness on NO2 Detection

Event

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

Band

Poster

Chapter

Chemical Sensors

Author(s)

D. L. Ferreira, R. A. da Silva, R. A. da Silva, M. O. Orlandi - São Paulo State University (Brazil)

Pages

398 - 399

DOI

10.5162/eurosensors2026/Mo-CHS-05

ISBN

978-3-910600-12-6

Price

free

Abstract

The influence of deposition technique and film thickness on SnO ₂ chemoresistive sensors for NO ₂ detection was investigated. Films were fabricated by screen-printing, drop-casting, and spin-coating, achieving thicknesses from ~380 nm to 30 μm. Thin spin-coated films enabled detection down to 0.2 ppm without saturation up to 10 ppm, while thick films showed early saturation due to diffusion limitations. The best device reached a response of 186 with high stability and repeatability. These results demonstrate that thickness control is a key parameter for optimizing gas sensor performance.