Results 21 to 30 of about 3,619,372 (170)
Highly Sensitive Trace Gas Detection Based on In-Plane Single-Quartz-Enhanced Dual Spectroscopy
Sensors, 2022 For this invited manuscript, an in-plane single-quartz-enhanced dual spectroscopy (IP-SQEDS)-based trace gas sensor was demonstrated for the first time.
Tiantian Liang +3 more
doaj +2 more sources
Photonics, 2023 This research proposes a method for the simultaneous acquisition of the second harmonic (2f) signal of quartz-enhanced photoacoustic spectroscopy (QEPAS) and the first harmonic (1f) signal of quartz-enhanced photothermal spectroscopy (QEPTS) based on the
Hao Liu +5 more
doaj +2 more sources
Quartz-Enhanced Photoacoustic Spectroscopy in the Terahertz Spectral Range
Photonics, 2023 Infrared laser photo-acoustic spectroscopy provides very high sensitivity of a gas sample analysis when high-power tunable laser radiation sources and resonant photo-acoustic detectors (PADs) are used.
Alexey P. Votintsev +4 more
doaj +3 more sources
In-plane quartz-enhanced photoacoustic spectroscopy
Applied Physics Letters, 2020 An optical gas sensing technique based on in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS) is reported. In IP-QEPAS, the laser beam is aligned in the plane of the quartz tuning fork (QTF) to increase the interaction area between the acoustic wavefront and the QTF.
Yufei Ma +6 more
core +4 more sources
Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy
Light: Science & ApplicationsThe extension of dual-comb spectroscopy (DCS) to all wavelengths of light along with its ability to provide ultra-large dynamic range and ultra-high spectral resolution, renders it extremely useful for a diverse array of applications in physics ...
Jiapeng Wang +6 more
doaj +4 more sources
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
Theoretical analysis of a resonant quartz-enhanced photoacoustic spectroscopy sensor [PDF]
Applied Physics B, 2017 In this paper, we report the first analytical model for quartz-enhanced photoacoustic spectroscopy in combination with an acoustic resonator. A generalized fundamental equation is proposed to model the photoacoustic effect, taking into account the coupling between the tuning fork and the surrounding fluid.
Aoust, Guillaume +5 more
openaire +2 more sources
Quartz-Enhanced Photoacoustic Spectroscopy Sensor with a Small-Gap Quartz Tuning Fork [PDF]
Sensors, 2018 A highly sensitive quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) with a small-gap of 200 μm was demonstrated.
Yu-Fei Ma +4 more
doaj +2 more sources
Single-tube on-beam quartz-enhanced photoacoustic spectroscopy
Optics Letters, 2016 Quartz-enhanced photoacoustic spectroscopy (QEPAS) with a single-tube acoustic microresonator (AmR) inserted between the prongs of a custom quartz tuning fork (QTF) was developed, investigated, and optimized experimentally. Due to the high acoustic coupling efficiency between the AmR and the QTF, the single-tube on-beam QEPAS spectrophone configuration
Zheng, Huadan +11 more
core +7 more sources
Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy [PDF]
Optics Express, 2019 We report on the design, realization, and performance of novel quartz tuning forks (QTFs) optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from a QTF geometry designed to provide a fundamental flexural in-plane vibrational mode resonance frequency of ~16 kHz, with a quality factor of 15,000 at atmospheric pressure, two novel ...
Pietro Patimisco +8 more
core +5 more sources