Results 251 to 260 of about 1,542,807 (290)

Mid-infrared swept cavity-enhanced photoacoustic spectroscopy using a quartz tuning fork

Applied Physics Letters, 2023
We report the development of swept cavity-enhanced photoacoustic spectroscopy using a quartz tuning fork for ultra-sensitive and high-resolution molecular spectroscopy.
Qinxue Nie, Zhen Wang, S. Borri, P. Natale, W. Ren   +4 more
semanticscholar   +1 more source

H-shaped acoustic micro-resonator-based quartz-enhanced photoacoustic spectroscopy.

Optics Letters, 2022
An H-shaped acoustic micro-resonator (AmR)-based quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor is demonstrated for the first time. The H-shaped AmR has the advantages of easy optical alignment, high utilization of laser energy, and reduction ...
Yufei Ma, Yinghao Hong, Shunda Qiao, Ziting Lang, Xiaonan Liu   +4 more
semanticscholar   +1 more source

Acoustic microresonator based in-plane quartz-enhanced photoacoustic spectroscopy sensor with a line interaction mode.

Optics Letters, 2022
An acoustic microresonator (AmR) based in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS) sensor with a line interaction mode is proposed for what is believed to be the first time.
Ziting Lang, Shunda Qiao, Yufei Ma
semanticscholar   +1 more source

High-Sensitivity Silicon Cantilever-Enhanced Photoacoustic Spectroscopy Analyzer with Low Gas Consumption.

Analytical Chemistry, 2022
A silicon cantilever-enhanced photoacoustic spectroscopy (PAS)-based trace gas analyzer with low gas consumption is presented. A silicon cantilever-based fiber-optic Fabry-Perot (F-P) interferometric acoustic sensor with a compact structure and high ...
M. Guo, Ke Chen, Chenxi Li, Lin Xu, Guangyin Zhang, Nan Wang, Chenyang Li, Fengxiang Ma, Z. Gong, Q. Yu   +9 more
semanticscholar   +1 more source

Standoff photoacoustic spectroscopy

Applied Physics Letters, 2008
Here, we demonstrate a variation of photoacoustic spectroscopy that can be used for obtaining spectroscopic information of surface adsorbed chemicals in a standoff fashion. Pulsed light scattered from a target excites an acoustic resonator and the variation of the resonance amplitude as a function of illumination wavelength yields a representation of ...
Thomas Thundat, C. W. Van Neste, Lawrence R. Senesac   +2 more
openaire   +2 more sources

Standoff Photoacoustic Spectroscopy of Explosives

Applied Spectroscopy, 2016
Detection and identification of unknown and possibly hazardous materials is a vital area of research to which infrared (IR) spectroscopy is ideally suited. Infrared absorption spectra can be measured with many sensing paradigms of which photoacoustic spectroscopy (PAS) is a sensitive and flexible variant.
Paul M. Pellegrino, Ellen L. Holthoff, Logan S. Marcus   +2 more
openaire   +3 more sources

Application of standard and custom quartz tuning forks for quartz-enhanced photoacoustic spectroscopy gas sensing

Applied spectroscopy reviews (Softcover ed.), 2022
A review on the design of quartz tuning forks and their applications in quartz-enhanced photoacoustic spectroscopy (QEPAS)-based trace gas sensors is reported. Standard commercial quartz tuning forks are used as sound wave transducers in the conventional
Haoyang Lin, Yihua Liu, Leqing Lin, Wenguo Zhu, Xu Zhou, Y. Zhong, M. Giglio, A. Sampaolo, P. Patimisco, F. Tittel, Jianhui Yu, V. Spagnolo, Huadan Zheng   +12 more
semanticscholar   +1 more source

Fiber-Tip Gas Transducer Based on All-Optical Photoacoustic Spectroscopy

Journal of Lightwave Technology, 2022
In this paper, a fiber-tip all-optical photoacoustic (PA) transducer is demonstrated. The transducer is integrated by a silicon cantilever, a single optical fiber and a silicon dioxide tube. The excitation light source of the PA signals and the detecting
Z. Gong, Guo-Xiong Wu, Ke Chen, M. Guo, Junsheng Ma, Haie Li, Fengxiang Ma, L. Mei, W. Peng, Q. Yu   +9 more
semanticscholar   +1 more source

Photoacoustic and photothermal spectroscopy

Physics in Technology, 1980
Photoacoustic and photothermal techniques are reviewed with emphasis on possible industrial applications. Their application to the physics of materials, to chemical processing, surface analysis, powder technology, high-temperature phases, etc., could have considerable impact on basic industrial know-how, and might even lead to methods for improved ...
P.-E. Nordal, S.O. Kanstad
openaire   +2 more sources

Quartz-enhanced photoacoustic spectroscopy sensing using trapezoidal- and round-head quartz tuning forks.

Optics Letters
In this Letter, two novel, to the best of our knowledge, quartz tuning forks (QTFs) with trapezoidal-head and round-head were designed and adopted for quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing.
Chao Fang, Tiantian Liang, Shunda Qiao, Ying He, Zuochun Shen, Yufei Ma   +5 more
semanticscholar   +1 more source