Results 241 to 250 of about 1,542,807 (290)

Photoacoustic point spectroscopy

, 2011
C. W. Van Neste, Lawrence R Senesac, Thomas Thundat   +2 more
openalex   +1 more source

High sensitivity and ultra-low concentration range photoacoustic spectroscopy based on trapezoid compound ellipsoid resonant photoacoustic cell and partial least square. [PDF]

Photoacoustics
Wang Q, Xu S, Zhu Z, Wang J, Zou X, Zhang C, Liu Q.   +6 more
europepmc   +1 more source

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Differential quartz-enhanced photoacoustic spectroscopy

Applied Physics Letters, 2023
In this paper, a differential quartz-enhanced photoacoustic spectroscopy (D-QEPAS) sensor is reported. The differential photoacoustic cell (PAC) was used to generate the photoacoustic effect. Two quartz tuning forks (QTFs) with a quality factor (Q) up to
Chu Zhang, Shunda Qiao, Ying He, Sheng Zhou, L. Qi, Yufei Ma   +5 more
semanticscholar   +1 more source

Differential integrating sphere-based photoacoustic spectroscopy gas sensing.

Optics Letters, 2023
In this Letter, a differential integrating sphere-based photoacoustic spectroscopy (PAS) gas sensor is proposed for the first time to our knowledge. The differential integrating sphere system consists of two integrating spheres and a tube.
Chu Zhang, Ying He, Shunda Qiao, Yufei Ma   +3 more
semanticscholar   +1 more source

Quartz-Enhanced Photoacoustic Spectroscopy-Conductance Spectroscopy for Gas Mixture Analysis.

Analytical Chemistry, 2023
A novel spectroscopic method, named quartz-enhanced photoacoustic spectroscopy-conductance spectroscopy (QEPAS-CS), was first developed for gas mixture analysis.
Ruobin Zhuang, Leqing Lin, Chenglong Wang, Haoyang Lin, Huijian Luo, Haohua Lv, Wenguo Zhu, Y. Zhong, Bin Liu, Ruifeng Kan, Jianhui Yu, Huadan Zheng   +11 more
semanticscholar   +1 more source

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO.

ACS Sensors, 2023
Breath hydrogen (H2) and methane (CH4) monitoring play an important role in the diagnosis of gastrointestinal disorders, such as lactose intolerance and small intestinal bacterial overgrowth (SIBO). In this paper, the photoacoustic spectroscopy method is
X. Mao, Yuting Tan, Hao Ye, Tai Yuan, Yuxuan Peng, Peichao Zheng   +5 more
semanticscholar   +1 more source

Helmholtz-resonator quartz-enhanced photoacoustic spectroscopy.

Optics Letters, 2023
In this work, Helmholtz-resonator quartz-enhanced photoacoustic spectroscopy (HR-QEPAS) was developed for trace gas sensing. A pair of Helmholtz resonators with high-order resonance frequency was designed and coupled with a quartz tuning fork (QTF ...
Huijian Luo, Chenglong Wang, Haoyang Lin, Qian Wu, Zhifei Yang, Wenguo Zhu, Y. Zhong, Ruifeng Kan, Jianhui Yu, Huadan Zheng   +9 more
semanticscholar   +1 more source

Miniaturized methane detection system based on photoacoustic spectroscopy

Microwave and optical technology letters (Print), 2023
As an important means of trace gas detection, photoacoustic spectroscopy mainly detects gas concentration indirectly through the thermal effect of light.
W. Ye, Linfeng He, Zikun Xia, Weihao Liu, Yifei Huang, Yiwen Lin   +5 more
semanticscholar   +1 more source

Development of photoacoustic spectroscopy with a piezofilm [PDF]

Applied Optics, 2007
We have developed photoacoustic spectroscopy with a piezofilm. A piezofilm is a piezoelectric element made from plastic polyvinylidene fluoride having piezoelectrical effect. Photoacoustic spectra (375-675 nm) of water, dye aqueous solution, and benzene, are measured with a xenon lamp.
Yugo Nosaka, Eiji Tokunaga
openaire   +2 more sources

Single-particle photoacoustic vibrational spectroscopy using optical microresonators

Nature Photonics, 2023
Natural vibrations of mesoscopic particles, such as living cells, are typically faint; occurring at megahertz to gigahertz frequencies also makes detection challenging.
S. Tang, Mingjie Zhang, Jialve Sun, Jialun Meng, X. Xiong, Q. Gong, Dayong Jin, Qifan Yang, Yun-Feng Xiao   +8 more
semanticscholar   +1 more source