Escher, Lukas and Rueck, Thomas and Jobst, Simon and Pangerl, Jonas and Bierl, Rudolf and Matysik, Frank-Michael (2025) Photodissociation-driven photoacoustic spectroscopy with UV-LEDs for ozone detection. PHOTOACOUSTICS, 43: 100718. ISSN 2213-5979,
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This study presents the development and evaluation of a UV-LED based photoacoustic (PA) measurement system for ozone (O3) detection to demonstrate its potential for low-cost and accurate sensing while for the first time addressing the importance of photodissociation for PA signal generation for O3 in the UV range. With a detection limit of 7.9 ppbV, the system exhibits a significant advancement over state-of-the-art UV-PA O3 detection and is on par with laser-based setups. Following a novel discussion of the PA signal arising from photodissociation and its products, cross-sensitivity effects due to environmental factors such as temperature and gas composition were systematically analyzed. A digital twin driven compensation for these influences was implemented and evaluated. Despite the challenges associated with modeling the effects of H2O and CO2, the PA system shows considerable potential, though further studies in real world applications must be conducted.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ULTRAVIOLET-LIGHT; ATMOSPHERIC OZONE; PHOTOLYSIS; PRESSURE; KINETICS; HUMIDITY; O(D-1); OH; Photoacoustic spectroscopy; UV-LED; Ozone; Photodissociation; Cross-sensitivity |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Jun 2026 09:24 |
| Last Modified: | 02 Jun 2026 09:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/65914 |
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