Results 11 to 20 of about 3,337,551 (141)

Quartz Enhanced Photoacoustic Spectroscopy on Solid Samples [PDF]

Sensors
Quartz-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, Marc-Simon Bahr, Bernd Baumann, Marcus Wolff   +3 more
doaj   +7 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, Diba Ayache, Nicolas Maurin, Wioletta Trzpil, Michael Bahriz, Aurore Vicet   +5 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, Jun Chang, Jie Lian, Zhaojun Liu, Qiang Wang, Zengguang Qin   +5 more
doaj   +4 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 ...
Guang Yu, Yu, Xin, Deying Chen, Yufei Ma, Frank K. Tittel, Sun, Rui, Rui Sun, Zhang, Jingbo, Jingbo Zhang, Li, Xudong, Ma, Yufei, Tittel, Frank K., Chen, Deying, Xudong Li, Xin Yu, Yu, Guang   +15 more
core   +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, Michael Köhring, Ulrike Willer, Wolfgang Schade   +3 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 ...
Sampaolo A., Wang Y., Patimisco P., Tittel F. K., Ma Y., Qiao S., Spagnolo V.   +6 more
core   +4 more sources

Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy

Light: Science & Applications
The 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, Hongpeng Wu, Angelo Sampaolo, Pietro Patimisco, Vincenzo Spagnolo, Suotang Jia, Lei Dong   +6 more
doaj   +4 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.
Sampaolo, Angelo, Zheng, Huadan, Yin, Xukun, Yin, Wangbao, Dong, Lei, Ma, Weiguang, Tittel, Frank K., SPAGNOLO, Vincenzo Luigi, Patimisco, Pietro, Zhang, Lei, Wu, Hongpeng, Jia, Suotang   +11 more
core   +7 more sources

Simultaneous Detection of Gas Concentration and Light Intensity Based on Dual-Quartz-Enhanced Photoacoustic-Photothermal Spectroscopy

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, Xiang Chen, Lu Yao, Zhenyu Xu, Mai Hu, Ruifeng Kan   +5 more
doaj   +2 more sources

Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy

Optics Express, 2019
We report on the design, realization, and performance of novel quartz tuning forks (QTFs) optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS).
Sampaolo A., Russo S., Rossmadl H., Patimisco P., Tittel F. K., Cable A., Giglio M., Spagnolo V., Mackowiak V.   +8 more
core   +5 more sources