Dual-comb quartz-enhanced photoacoustic spectroscopy [PDF]
Photoacoustics, 2022 Photoacoustic spectroscopy (PAS) using two optical combs is a new-born technique, offering appealing features, including broad optical bandwidths, high resolutions, fast acquisition speeds, and wavelength-independent photoacoustic detection, for chemical
Xinyi Ren +6 more
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Quartz Enhanced Photoacoustic Spectroscopy on Solid Samples [PDF]
SensorsQuartz-Enhanced Photoacoustic Spectroscopy (QEPAS) is a technique in which the sound wave is detected by a quartz tuning fork (QTF). It enables particularly high specificity with respect to the excitation frequency and is well known for an ...
Judith Falkhofen +3 more
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Quartz-Enhanced Photoacoustic Spectroscopy: A Review [PDF]
Sensors, 2014 A detailed review on the development of quartz-enhanced photoacoustic sensors (QEPAS) for the sensitive and selective quantification of molecular trace gas species with resolved spectroscopic features is reported.
Pietro Patimisco +3 more
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Ppb-level gas detection using on-beam quartz-enhanced photoacoustic spectroscopy based on a 28 kHz tuning fork [PDF]
Photoacoustics, 2022 In this paper, an on-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) acting as a photoacoustic transducer, was realized and tested. The QTF is characterized by a resonance frequency of 28 kHz, ~15%
Haoyang Lin +12 more
doaj +2 more sources
Quartz-enhanced photoacoustic spectroscopy employing pilot line manufactured custom tuning forks [PDF]
Photoacoustics, 2020 Pilot line manufactured custom quartz tuning forks (QTFs) with a resonance frequency of 28 kHz and a Q value of >30, 000 in a vacuum and ∼ 7500 in the air, were designed and produced for trace gas sensing based on quartz enhanced photoacoustic ...
Huadan Zheng +19 more
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Commercial and Custom Quartz Tuning Forks for Quartz Enhanced Photoacoustic Spectroscopy: Stability under Humidity Variation [PDF]
Sensors, 2023 This work investigates the behavior of commercial and custom Quartz tuning forkss (QTF) under humidity variations. The QTFs were placed inside a humidity chamber and the parameters were studied with a setup to record the resonance frequency and quality ...
Diba Ayache +8 more
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Influence of Tuning Fork Resonance Properties on Quartz-Enhanced Photoacoustic Spectroscopy Performance [PDF]
Sensors, 2019 A detailed investigation of the influence of quartz tuning forks (QTFs) resonance properties on the performance of quartz-enhanced photoacoustic spectroscopy (QEPAS) exploiting QTFs as acousto-electric transducers is reported.
Huadan Zheng +15 more
doaj +2 more sources
Mid-infrared intracavity quartz-enhanced photoacoustic spectroscopy with pptv – Level sensitivity using a T-shaped custom tuning fork [PDF]
Photoacoustics, 2022 Resonant optical power buildup inside a high finesse cavity is exploited to boost the sensitivity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for CO, N2O and H2O detection, operating at a wavelength of 4.59 µm.
Jakob Hayden +4 more
doaj +2 more sources
Breath Isoprene Sensor Based on Quartz-Enhanced Photoacoustic Spectroscopy [PDF]
SensorsIsoprene, the most abundant endogenous hydrocarbon in human breath, is a promising biomarker for metabolic and cardiovascular diseases. In this paper, we present the detection of isoprene in exhaled breath using the off-beam Quartz-Enhanced Photoacoustic
Fadia Abou Naoum +11 more
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Quartz Enhanced Photoacoustic Spectroscopy Based on a Custom Quartz Tuning Fork [PDF]
Sensors, 2019 We have designed and fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency; a larger gap between the prongs; and the best quality factor in air at atmospheric conditions ever reported, to our knowledge.
Maxime Duquesnoy +5 more
doaj +2 more sources