Results 21 to 30 of about 13,912 (266)

High-sensitivity methane detection based on QEPAS and H-QEPAS technologies combined with a self-designed 8.7 kHz quartz tuning fork. [PDF]

Photoacoustics
Liang T, Qiao S, Chen Y, He Y, Ma Y.
europepmc   +2 more sources

Conductance-photoacoustic spectroscopy for fast and concurrent sensing of hydrogen and hydrocarbons [PDF]

Photoacoustics
Accurate and rapid detection of hydrogen and hydrocarbons is critical for safety and efficiency in modern energy, industrial, and environmental systems.
Ruobin Zhuang, Jianfeng He, Haoyang Lin, Huijian Luo, Leqing Lin, Lihao Wang, Bin Liu, Wenguo Zhu, Yongchun Zhong, Jianhui Yu, Markus Sigrist, Huadan Zheng   +11 more
doaj   +2 more sources

Improved T-shaped quartz tuning fork with isosceles-trapezoidal grooves optimized for quartz-enhanced photoacoustic spectroscopy. [PDF]

Photoacoustics
Fang F, Wang R, Shao D, Wang Y, Tao Y, Lin S, Ma Y, Liang J.   +7 more
europepmc   +2 more sources

Mid-infrared intracavity quartz-enhanced photoacoustic spectroscopy with pptv – Level sensitivity using a T-shaped custom tuning fork

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, Marilena Giglio, Angelo Sampaolo, Vincenzo Spagnolo, Bernhard Lendl   +4 more
doaj   +1 more source

Introduction to the quartz tuning fork [PDF]

American Journal of Physics, 2007
We discuss various aspects of the quartz tuning fork, ranging from its original purpose as a high quality factor resonator for use as a stable frequency reference, to more exotic applications in sensing and scanning probe microscopy. We show experimentally how to tune the quality factor by injecting energy in phase with the current at resonance ...
Friedt, J.-M., Carry, E.
openaire   +2 more sources

Quartz Tuning Fork Resonance Tracking and application in Quartz Enhanced Photoacoustics Spectroscopy. [PDF]

Sensors (Basel), 2019
The quartz tuning fork (QTF) is a piezoelectric transducer with a high quality factor that was successfully employed in sensitive applications such as atomic force microscopy or Quartz-Enhanced Photo-Acoustic Spectroscopy (QEPAS). The variability of the environment (temperature, humidity) can lead to a drift of the QTF resonance.
Rousseau R, Maurin N, Trzpil W, Bahriz M, Vicet A.   +4 more
europepmc   +5 more sources

Additively Manufactured Detection Module with Integrated Tuning Fork for Enhanced Photo-Acoustic Spectroscopy

Sensors, 2022
Starting from Quartz-Enhanced Photo-Acoustic Spectroscopy (QEPAS), we have explored the potential of a tightly linked method of gas/vapor sensing, from now on referred to as Tuning-Fork-Enhanced Photo-Acoustic Spectroscopy (TFEPAS). TFEPAS utilizes a non-
Roberto Viola, Nicola Liberatore, Sandro Mengali   +2 more
doaj   +1 more source

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, Shunda Qiao, Ziting Lang, Yufei Ma   +3 more
doaj   +1 more source

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 ...
Angelo Sampaolo, Pietro Patimisco, Marilena Giglio, Miriam Vitiello, Harvey Beere, David Ritchie, Gaetano Scamarcio, Frank Tittel, Vincenzo Spagnolo   +8 more
openaire   +4 more sources

Photoacoustic spectroscopy for gas sensing: A comparison between piezoelectric and interferometric readout in custom quartz tuning forks

Photoacoustics, 2020
We report on a comparison between piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) when acting as sound wave transducers in a quartz-enhanced photoacoustic setup (QEPAS) for trace gas detection.
Stefano Dello Russo, Sheng Zhou, Andrea Zifarelli, Pietro Patimisco, Angelo Sampaolo, Marilena Giglio, Davide Iannuzzi, Vincenzo Spagnolo   +7 more
doaj   +1 more source