Advanced Photoacoustic Spectroscopy and Its Applications

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Atmospheric Techniques, Instruments, and Modeling".

Deadline for manuscript submissions: closed (26 May 2023) | Viewed by 2749

Special Issue Editors

Ningbo Research Institute, Zhejiang University, Ningbo 315100, China
Interests: absorption spectroscopy; photoacoustic spectroscopy; trace gas detection; atmospheric aerosol; black carbon
Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
Interests: new photoacoustic and photothermal sensing technology; tunable diode laser absorption spectroscopy; development and testing of optoelectronic instruments; trace gas detection; absorption spectroscopy
Special Issues, Collections and Topics in MDPI journals
Laboratoire de Physico-Chimie de l’Atmosphère, University of Littoral Opal Coast, 59140 Dunkerque, France
Interests: absorption spectroscopy; photoacoustic spectroscopy; trace gas detection; atmospheric and marine aerosol; black carbon; optical measurement by drone

Special Issue Information

Dear Colleagues,

Particulate matter (PM) and trace gas sensors with the advantages of low cost, high sensitivity, and high selectivity are strongly required in a broad range of applications, from atmospheric monitoring to industrial process control, and from life science research to biomedical application. Photoacoustic spectroscopy (PAS) is recognized as one of the best tools for PM and trace gas sensing, which relies on the detection of acoustic signals resulting from the light absorption of a modulated laser radiation by the target species. Various photoacoustic approaches have been developed using different acoustic transducers, including condenser and electret microphones, quartz tuning fork (QTF), micromachined cantilever, microelectromechanical systems (MEMSs), etc. Different photoacoustic cell structures have been reported for improving photo-acoustic signals and suppressing noise to further enhance the sensor performance. PAS sensors have one unique advantage, which is that their performance is proportional to excitation optical power. Many methods have been investigated to build up high optical power in the PAS cell to improve the sensitivity of PAS gas detection. Therefore, various photoacoustic techniques with different acoustic transducers and PAS cell structures have been reported with ultra-high sensitivity of parts-per-trillion. The purpose of this Special Issue is to concentrate on advanced photoacoustic spectroscopy based on novel acoustic transducers and novel PAS cell structures developed for various applications, including atmospheric monitoring, industrial process control, biomedical application, etc.

Dr. Gaoxuan Wang
Prof. Dr. Lei Dong
Dr. Tong Nguyen Ba
Guest Editors

Manuscript Submission Information

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Keywords

  • absorption spectroscopy
  • photoacoustic spectroscopy
  • trace gas detection
  • atmospheric aerosol
  • black carbon

Published Papers (2 papers)

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Research

16 pages, 11179 KiB  
Article
Optimization of Photoacoustic Cell for Trace Acetylene Detection in Transformer Oil
by Tianhe Yang, Kai Zhou, Lei Jin, Rui Liu and Weigen Chen
Atmosphere 2023, 14(5), 801; https://doi.org/10.3390/atmos14050801 - 28 Apr 2023
Cited by 1 | Viewed by 1091
Abstract
This paper presents the development of a highly sensitive gas detection system based on a resonant photoacoustic cell for detecting dissolved gases in transformer oil. A simulation model of the resonant photoacoustic cell was studied and optimized the buffer chamber volume while ensuring [...] Read more.
This paper presents the development of a highly sensitive gas detection system based on a resonant photoacoustic cell for detecting dissolved gases in transformer oil. A simulation model of the resonant photoacoustic cell was studied and optimized the buffer chamber volume while ensuring signal enhancement. The volume of the photoacoustic cell was reduced by about 80% compared to the classical model. A resonant photoacoustic cell was then fabricated based on the optimized simulation optimization. The dual-resonance photoacoustic system was constructed by combining the resonant PA cell with a handmade cantilever fiber acoustic sensor. The system’s sensitivity was further improved by using an erbium-doped fiber amplifier, wavelength modulation, and harmonic detection technology. The experimental results showed that the system achieved a detection limit of 6 ppb and an excellent linear range under 1000 ppm for C2H2 gas. The developed gas detection system has potential applications for monitoring the condition of power transformers in power grids. Full article
(This article belongs to the Special Issue Advanced Photoacoustic Spectroscopy and Its Applications)
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12 pages, 5751 KiB  
Communication
A Compact NO2 Gas Sensor with an Optimized Photoacoustic Cell and 450 nm-LD
by Wenyang Yuan, Jiaqi Yao, Ping Gong, Mingqi Jiao, Congbiao Lei, Yuxuan Jiang and Liang Xie
Atmosphere 2023, 14(4), 704; https://doi.org/10.3390/atmos14040704 - 12 Apr 2023
Viewed by 1245
Abstract
In this paper, a compact ambient gas sensor with an optimized photoacoustic cell is reported. The relationship between the geometric dimensions (usually radius and length) of the photoacoustic cell (PAC) and the acoustic signal was studied through theoretical and finite element analysis. Then [...] Read more.
In this paper, a compact ambient gas sensor with an optimized photoacoustic cell is reported. The relationship between the geometric dimensions (usually radius and length) of the photoacoustic cell (PAC) and the acoustic signal was studied through theoretical and finite element analysis. Then an optimized H-type PAC with a volume of 80 mm × 30 mm × 30 mm was machined out. The gas capacity is only 18.85 millilitres. The performance of the photoacoustic cell has been verified experimentally by the detection of nitrogen dioxide (NO2) standard gas. With an electret microphone and an economically self-designed 450 nm laser module, the detection of NO2 concentration was executed. The experimental results show good linearity with a fitting R-square of 0.9991. With an SNR (signal-to-noise ratio) of 41.247, the minimum detection limit (MDL) of the system can reach 4.85 ppb (1σ). With an analysis of allan variance, the MDL can achieve 0.11 ppb with a 228 s integration time. By replacing the light source, the system shows great potential for sensitive and compact detectors for other ambient gasses as well. Full article
(This article belongs to the Special Issue Advanced Photoacoustic Spectroscopy and Its Applications)
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