OT5.156 - Novel chemical sensor device enabled by simultaneous thermal-optical excitation
- Event
- EUROSENSORS XXXVI
2024-09-01 - 2024-09-04
Debrecen (Hungary) - Band
- Lectures
- Chapter
- OT5 - Chemical Sensors
- Author(s)
- F. Sosada-Ludwikowska, L. Egger, A. Köck - Materials Center Leoben Forschung GmbH, Leoben (Austria), O. Casals, D. J. Prades - Universitat de Barcelona, Barcelona (Spain)
- Pages
- 121 - 122
- DOI
- 10.5162/EUROSENSORSXXXVI/OT5.156
- ISBN
- 978-3-910600-03-4
- Price
- free
Abstract
We present a novel chemical sensor device based on ultrathin metal oxide films functionalized with metallic nanoparticles, which combines both thermal as well as optical excitation into a single system. This is achieved by a modular setup employing SiN-based micro-hotplate (μhp) chips, and LEDs, which are mounted opposite of the μhp chips. First results show that the sensor response is dramati-cally improved in case of optical excitation: Activation of SnO2 sensors functionalized with Cu-nanoparticles by LEDs emitting at 270 nm results in a sensor response of 32% at room temperature towards 20 ppm HCmix in synthetic air (50% rh). By combining this dual excitation mode, we open an entirely new parameter space for chemical sensors, which has not been explored yet.