Photodissociation-driven photoacoustic spectroscopy with UV-LEDs for ozone detection
Year: 2025
Type: article
Abstract: This study presents the development and evaluation of a UV-LED based photoacoustic (PA) measurement system for ozone (O 3 ) 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 O 3 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 O 3 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 H 2 O and CO 2 , the PA system shows considerable potential, though further studies in real world applications must be conducted.
Source: Photoacoustics
Institutions: OTH Regensburg, University of Regensburg
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,200
OpenAlex ID: W4409018380