Results 21 to 30 of about 7,101 (242)

Note: A transimpedance amplifier for remotely located quartz tuning forks [PDF]

Review of Scientific Instruments, 2012
The cable capacitance in cryogenic and high vacuum applications of quartz tuning forks imposes severe constraints on the bandwidth and noise performance of the measurement. We present a single stage low noise transimpedance amplifier with a bandwidth exceeding 1 MHz and provide an in-depth analysis of the dependence of the amplifier parameters on the ...
Ethan Kleinbaum, Gábor A. Csáthy
openalex   +7 more sources

Quartz-enhanced photoacoustic NH₃ sensor exploiting a large-prong-spacing quartz tuning fork and an optical fiber amplifier for biomedical applications. [PDF]

Photoacoustics, 2022
Shang Z, Li S, Li B, Wu H, Sampaolo A, Patimisco P, Spagnolo V, Dong L.   +7 more
europepmc   +2 more sources

Equivalent Electromechanical Model for Quartz Tuning Fork Used in Atomic Force Microscopy. [PDF]

Sensors (Basel), 2023
Lin R, Qian J, Li Y, Cheng P, Wang C, Li L, Gao X, Sun W.   +7 more
europepmc   +3 more sources

Dual-frequency modulation quartz crystal tuning fork–enhanced laser spectroscopy

Optics Express, 2020
An innovative trace gas-sensing technique utilizing a single quartz crystal tuning fork (QCTF) based on a photoelectric detector and dual-frequency modulation technique was demonstrated for the first time for simultaneous multi-species detection. Instead of traditional semiconductor detectors and lock-in amplifier, we utilized the piezoelectric effect ...
Linguang Xu, Ningwu Liu, Sheng Zhou, Lei Zhang, Benli Yu, Horst Fischer, Jingsong Li   +6 more
openalex   +4 more sources

Quartz-Tuning-Fork-Enhanced Spectroscopy Based on Fast Fourier Transform Algorithm [PDF]

Frontiers in Physics, 2020
In this paper, a gas sensing technique based on quartz-crystal-tuning-fork-enhanced spectroscopy (QCTFES) and wavelength modulation spectroscopy (WMS) is reported.
Guangxiang Yang, Linguang Xu, Hua Liang, Jingsong Li   +3 more
doaj   +2 more sources

A High Sensitivity Preamplifier for Quartz Tuning Forks in QEPAS (Quartz Enhanced PhotoAcoustic Spectroscopy) Applications [PDF]

Sensors, 2017
All the preamplifiers dedicated for Quartz Enhanced PhotoAcoustic Spectroscopy (QEPAS) applications that have so far been reported in the literature have been based on operational amplifiers working in transimpedance configurations.
Tomasz Starecki, Piotr Z. Wieczorek
doaj   +2 more sources

Analysis of the Frequency Shift versus Force Gradient of a Dynamic AFM Quartz Tuning Fork Subject to Lennard-Jones Potential Force. [PDF]

Sensors (Basel), 2019
Chang CO, Chang-Chien WT, Song JP, Zhou C, Huang BS.   +4 more
europepmc   +3 more sources

Calibration of a Quartz Tuning Fork as a Sound Detector

Applied Sciences
This study compares the performance of a quartz tuning fork (QTF) with a highly sensitive ultrasound microphone in the context of acoustic measurements, applying the substitution calibration method.
Judith Falkhofen, Marcus Wolff
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

Study and Characterization of Silicon Nitride Optical Waveguide Coupling with a Quartz Tuning Fork for the Development of Integrated Sensing Platforms. [PDF]

Sensors (Basel)
Melchiorre L, Thottoli A, Vorobev AS, Menduni G, Sampaolo A, Magno G, O'Faolain L, Spagnolo V.   +7 more
europepmc   +3 more sources