光解驱动光声光谱与uv - led臭氧检测

IF 7.1 1区医学 Q1 ENGINEERING, BIOMEDICAL

Photoacoustics Pub Date : 2025-03-29 DOI:10.1016/j.pacs.2025.100718

Lukas Escher , Thomas Rück , Simon Jobst , Jonas Pangerl , Rudolf Bierl , Frank-Michael Matysik

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引用次数: 0

摘要

本研究提出了一种基于UV- led的臭氧（O3）检测光声（PA）测量系统的开发和评估，以证明其低成本和精确传感的潜力，同时首次解决了光解作用对紫外范围内臭氧（O3）的PA信号产生的重要性。该系统的检测限为7.9 ppbV，与最先进的UV-PA O3检测相比，具有显著的进步，与基于激光的设置相当。在对光解及其产物产生的PA信号进行了新颖的讨论之后，系统地分析了温度和气体成分等环境因素引起的交叉敏感效应。对这些影响实施并评估了数字孪生驱动的补偿。尽管在模拟H2O和CO2的影响方面存在挑战，但PA系统显示出相当大的潜力，尽管必须在实际应用中进行进一步的研究。

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Photodissociation-driven photoacoustic spectroscopy with UV-LEDs for ozone detection

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.

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来源期刊

Photoacoustics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

11.40

自引率

16.50%

发文量

审稿时长

53 days

期刊介绍： The open access Photoacoustics journal (PACS) aims to publish original research and review contributions in the field of photoacoustics-optoacoustics-thermoacoustics. This field utilizes acoustical and ultrasonic phenomena excited by electromagnetic radiation for the detection, visualization, and characterization of various materials and biological tissues, including living organisms. Recent advancements in laser technologies, ultrasound detection approaches, inverse theory, and fast reconstruction algorithms have greatly supported the rapid progress in this field. The unique contrast provided by molecular absorption in photoacoustic-optoacoustic-thermoacoustic methods has allowed for addressing unmet biological and medical needs such as pre-clinical research, clinical imaging of vasculature, tissue and disease physiology, drug efficacy, surgery guidance, and therapy monitoring. Applications of this field encompass a wide range of medical imaging and sensing applications, including cancer, vascular diseases, brain neurophysiology, ophthalmology, and diabetes. Moreover, photoacoustics-optoacoustics-thermoacoustics is a multidisciplinary field, with contributions from chemistry and nanotechnology, where novel materials such as biodegradable nanoparticles, organic dyes, targeted agents, theranostic probes, and genetically expressed markers are being actively developed. These advanced materials have significantly improved the signal-to-noise ratio and tissue contrast in photoacoustic methods.