Quartz-Enhanced Photoacoustic Spectroscopy for One-Health [PDF]
EPJ Web of Conferences, 2023 We report on the development of Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) technology to detect 8 different air pollutants, namely CH4, NO2, CO2, N2O, CO, NO, SO2 and NH3, with the same acoustic detection module and interchangeable laser sources,
Patimisco Pietro +9 more
doaj +3 more sources
Quartz-Enhanced Photoacoustic Spectroscopy with Right-Angle Prism [PDF]
Sensors, 2016 A right-angle prism was used to enhance the acoustic signal of a quartz-enhanced photoacoustic spectroscopy (QEPAS) system. The incident laser beam was parallelly inverted by the right-angle prism and passed through the gap between two tuning fork prongs
Yongning Liu +5 more
doaj +5 more sources
Spatially engineered optical–acoustic matching in quartz-enhanced photoacoustic spectroscopy [PDF]
PhotoacousticsQuartz-enhanced photoacoustic spectroscopy (QEPAS) offers high sensitivity for trace-gas detection, but its performance is often limited by a spatial mismatch between distributed photoacoustic excitation and the intrinsic sensitivity region of the quartz
Ruyue Cui +10 more
doaj +3 more sources
Monolithic Double Resonator for Quartz Enhanced Photoacoustic Spectroscopy [PDF]
Applied Sciences, 2021 A new approach for Quartz Enhanced Photoacoustic Spectroscopy is presented, based on an acoustic excitation from the outside of the prongs of a quartz tuning fork, to increase the sensitivity of the sensor.
Roman Rousseau +5 more
doaj +3 more sources
Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy
PhotoacousticsFolded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy (FO-QEPA-PTS) is reported for the first time. In FO-QEPA-PTS, the detection of the photoacoustic and photothermal hybrid signal is achieved through the use of a custom
Ruyue Cui +5 more
doaj +4 more sources
Effect of gas turbulence in quartz-enhanced photoacoustic spectroscopy: A comprehensive flow field analysis [PDF]
PhotoacousticsHere we present a computational and experimental fluid dynamics study for the characterization of the flow field within the gas chamber of a Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) sensor, at different flow rates at the inlet of the chamber ...
Andrea Zifarelli +9 more
doaj +5 more sources
Quartz-Enhanced Photoacoustic and Photothermal Spectroscopy [PDF]
Applied Sciences, 2022 The development of innovative gas-sensing systems is fundamental in diverse research fields such as physics, chemistry, biology, medicine and environmental science [...]
Hongpeng Wu, Angelo Sampaolo
doaj +2 more sources
Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy [PDF]
Sensors, 2016 We report on a quartz-enhanced photoacoustic (QEPAS) sensor for methanol (CH3OH) detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the QEPAS sensing performance in the terahertz (THz) spectral range. A discussion of the QTF properties in terms of resonance frequency, quality factor and acousto-electric transduction ...
Harvey E. Beere +2 more
exaly +7 more sources
Multi-quartz-enhanced photoacoustic spectroscopy [PDF]
Applied Physics Letters, 2015 A multi-quartz-enhanced photoacoustic spectroscopy (M-QEPAS) sensor system for trace gas detection is reported. Instead of a single quartz tuning fork (QTF) as used in QEPAS technique, a dual QTF sensor platform was adopted in M-QEPAS to increase the signal strength by the addition of the detected QEPAS signals.
Ma, Yufei +7 more
openaire +3 more sources
Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy
Sensors, 2010 Molecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus ...
Andreas Pohlkötter +3 more
doaj +3 more sources