Compact Gas Sensing System Based on Mid-Infrared LED and Resonant Detection with Quartz Tuning Fork

2009 ◽  
Author(s):  
Ulrike Willer ◽  
Claus Romano ◽  
Wolfgang Schade
Keyword(s):  
Tuning Fork ◽  
Gas Sensing ◽  
Quartz Tuning Fork ◽  
Mid Infrared ◽  
Sensing System

scholarly journals Piezo-enhanced acoustic detection module for mid-infrared trace gas sensing using a grooved quartz tuning fork

2019 ◽  
Vol 27 (24) ◽  
pp. 35267 ◽  
Author(s):  
Shangzhi Li ◽  
Hongpeng Wu ◽  
Ruyue Cui ◽  
Angelo Sampaolo ◽  
Pietro Patimisco ◽  
...  
Keyword(s):  
Tuning Fork ◽  
Gas Sensing ◽  
Quartz Tuning Fork ◽  
Trace Gas ◽  
Acoustic Detection ◽  
Mid Infrared ◽  
Trace Gas Sensing

Detection of Chemical Host–Guest Interactions Using a Quartz Tuning Fork Sensing System

2020 ◽  
Vol 20 (21) ◽  
pp. 12543-12551
Author(s):  
Abeer Alshammari ◽  
Fadwa Aldosari ◽  
Najd Bin Qarmalah ◽  
Ahoud Lsloum ◽  
Muthumareeswaran Muthuramamoorthy ◽  
...  
Keyword(s):  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Sensing System

scholarly journals Acoustic Detection Module Design of a Quartz-Enhanced Photoacoustic Sensor

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1093 ◽  
Author(s):  
Tingting Wei ◽  
Hongpeng Wu ◽  
Lei Dong ◽  
Frank Tittel
Keyword(s):  
Near Infrared ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Acoustic Detection ◽  
Numerous Application ◽  
Mid Infrared ◽  
Module Design ◽  
Laser Sources ◽  
Infrared Laser Sources ◽  
Reliability And Robustness

This review aims to discuss the latest advancements of an acoustic detection module (ADM) based on quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from guidelines for the design of an ADM, the ADM design philosophy is described. This is followed by a review of the earliest standard quartz tuning fork (QTF)-based ADM for laboratory applications. Subsequently, the design of industrial fiber-coupled and free-space ADMs based on a standard QTF for near-infrared and mid-infrared laser sources respectively are described. Furthermore, an overview of the latest development of a QEPAS ADM employing a custom QTF is reported. Numerous application examples of four QEPAS ADMs are described in order to demonstrate their reliability and robustness.

scholarly journals Application of Micro Quartz Tuning Fork in Trace Gas Sensing by Use of Quartz-Enhanced Photoacoustic Spectroscopy

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5240 ◽  
Author(s):  
Haoyang Lin ◽  
Zhao Huang ◽  
Ruifeng Kan ◽  
Huadan Zheng ◽  
Yihua Liu ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Tuning Fork ◽  
Gas Sensing ◽  
Modulation Depth ◽  
Quartz Tuning Fork ◽  
Acoustic Resonance ◽  
Photoacoustic Signal ◽  
Integration Time ◽  
Sampling Volume ◽  
Qepas Sensor

A novel quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a micro quartz tuning fork (QTF) is reported. As a photoacoustic transducer, a novel micro QTF was 3.7 times smaller than the usually used standard QTF, resulting in a gas sampling volume of ~0.1 mm3. As a proof of concept, water vapor in the air was detected by using 1.39 μm distributed feedback (DFB) laser. A detailed analysis of the performance of a QEPAS sensor based on the micro QTF was performed by detecting atmosphere H2O. The laser focus position and the laser modulation depth were optimized to improve the QEPAS excitation efficiency. A pair of acoustic micro resonators (AmRs) was assembled with the micro QTF in an on-beam configuration to enhance the photoacoustic signal. The AmRs geometry was optimized to amplify the acoustic resonance. With a 1 s integration time, a normalized noise equivalent absorption coefficient (NNEA) of 1.97 × 10−8 W·cm−1·Hz−1/2 was achieved when detecting H2O at less than 1 atm.

Quartz tuning fork-based photodetector for mid-infrared laser spectroscopy

2018 ◽  
Vol 124 (5) ◽  
Author(s):  
Junya Ding ◽  
Tianbo He ◽  
Sheng Zhou ◽  
Lei Zhang ◽  
Jingsong Li
Keyword(s):  
Laser Spectroscopy ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Infrared Laser ◽  
Mid Infrared ◽  
Infrared Laser Spectroscopy

Mid-Infrared Quartz-Enhanced Photoacoustic Sensor for ppb-Level CO Detection in a SF6 Gas Matrix Exploiting a T-Grooved Quartz Tuning Fork

2020 ◽  
Vol 92 (20) ◽  
pp. 13922-13929 ◽  
Author(s):  
Bo Sun ◽  
Andrea Zifarelli ◽  
Hongpeng Wu ◽  
Stefano Dello Russo ◽  
Shangzhi Li ◽  
...  
Keyword(s):  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Mid Infrared ◽  
Co Detection

scholarly journals Development and Comparative Analysis of Electrochemically Etched Tungsten Tips for Quartz Tuning Fork Sensor

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 286
Author(s):  
Ashfaq Ali ◽  
Naveed Ullah ◽  
Asim Ahmad Riaz ◽  
Muhammad Zeeshan Zahir ◽  
Zuhaib Ali Khan ◽  
...  
Keyword(s):  
Tuning Fork ◽  
Mechanical Stability ◽  
Electrochemical Etching ◽  
Research Work ◽  
Cone Angle ◽  
Quartz Tuning Fork ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
High Quality ◽  
Scanning Electron

Quartz Tuning Fork (QTF) based sensors are used for Scanning Probe Microscopes (SPM), in particular for near-field scanning optical microscopy. Highly sharp Tungsten (W) tips with larger cone angles and less tip diameter are critical for SPM instead of platinum and iridium (Pt/Ir) tips due to their high-quality factor, conductivity, mechanical stability, durability and production at low cost. Tungsten is chosen for its ease of electrochemical etching, yielding high-aspect ratio, sharp tips with tens of nanometer end diameters, while using simple etching circuits and basic electrolyte chemistry. Moreover, the resolution of the SPM images is observed to be associated with the cone angle of the SPM tip, therefore Atomic-Resolution Imaging is obtained with greater cone angles. Here, the goal is to chemically etch W to the smallest possible tip apex diameters. Tips with greater cone angles are produced by the custom etching procedures, which have proved superior in producing high quality tips. Though various methods are developed for the electrochemical etching of W wire, with a range of applications from scanning tunneling microscopy (SPM) to electron sources of scanning electron microscopes, but the basic chemical etching methods need to be optimized for reproducibility, controlling cone angle and tip sharpness that causes problems for the end users. In this research work, comprehensive experiments are carried out for the production of tips from 0.4 mm tungsten wire by three different electrochemical etching techniques, that is, Alternating Current (AC) etching, Meniscus etching and Direct Current (DC) etching. Consequently, sharp and high cone angle tips are obtained with required properties where the results of the W etching are analyzed, with optical microscope, and then with field emission scanning electron microscopy (FE-SEM). Similarly, effects of varying applied voltages and concentration of NaOH solution with comparison among the produced tips are investigated by measuring their cone angle and tip diameter. Moreover, oxidation and impurities, that is, removal of contamination and etching parameters are also studied in this research work. A method has been tested to minimize the oxidation on the surface and the tips were characterized with scanning electron microscope (SEM).

Low-volume liquid delivery and nanolithography using a nanopipette combined with a quartz tuning fork-atomic force microscope

Nanoscale ◽  
2012 ◽  
Vol 4 (20) ◽  
pp. 6493 ◽  
Author(s):  
Sangmin An ◽  
Corey Stambaugh ◽  
Gunn Kim ◽  
Manhee Lee ◽  
Yonghee Kim ◽  
...  
Keyword(s):  
Atomic Force Microscope ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Atomic Force ◽  
Low Volume ◽  
Liquid Delivery

scholarly journals iHEART: a miniaturized near-infrared in-line gas sensor using heart-shaped substrate-integrated hollow waveguides

The Analyst ◽  
2016 ◽  
Vol 141 (18) ◽  
pp. 5298-5303 ◽  
Author(s):  
Rafael L. Ribessi ◽  
Thiago de A. Neves ◽  
Jarbas J. R. Rohwedder ◽  
Celio Pasquini ◽  
Ivo M. Raimundo ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Near Infrared ◽  
Gas Sensing ◽  
Hollow Waveguide ◽  
Hollow Waveguides ◽  
Sensing System

Integration of a heart-shaped substrate-integrated hollow waveguide with a micro-spectrometer results in an ultra-compact gas sensing system: iHEART.

Sign in / Sign up

Export Citation Format

Share Document