2.2.1 - Raman and Photoluminescence Spectroscopy Detection of NO₂ gas Adsorbed on ZnO Nanowires
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Optical Sensors
- Author(s)
- F. Rigoni, M. Ponzoni, M. Borsi, D. Zappa, E. Comini - Università di Brescia,Brescia (Italy)
- Pages
- 81 - 82
- DOI
- 10.5162/eurosensors2026/2.2.1
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
NO 2 detection via optical techniques is of significant interest for gaining deeper insight into gas sensing mechanisms. ZnO nanowires represent an excellent model system due to their high surface-to-volume ratio and defect-mediated surface reactivity, which enhance sensitivity to adsorbed species. NO 2 adsorption induces charge transfer processes that modulate oxygen vacancy-related states, leading to measurable changes in both Raman spectra and photoluminescence emissions. The effect of NO 2 adsorption on the ZnO nanowires surface was investigated by Raman spectroscopy, observing an increase in the LO phonon band around 550 cm -1 , and related to the PL contribution.