Results 41 to 50 of about 3,337,551 (141)

Highly Sensitive Capacitive MEMS for Photoacoustic Gas Trace Detection

Sensors, 2023
An enhanced MEMS capacitive sensor is developed for photoacoustic gas detection. This work attempts to address the lack of the literature regarding integrated and compact silicon-based photoacoustic gas sensors. The proposed mechanical resonator combines
Tarek Seoudi, Julien Charensol, Wioletta Trzpil, Fanny Pages, Diba Ayache, Roman Rousseau, Aurore Vicet, Michael Bahriz   +7 more
doaj   +1 more source

Benzene sensing by Quartz Enhanced Photoacoustic Spectroscopy at 14.85 µm

Optics Express, 2022
Benzene is a gas known to be highly pollutant for the environment, for the water and cancerogenic for humans. In this paper, we present a sensor based on Quartz Enhanced Photoacoustic Spectroscopy dedicated to benzene analysis. Exploiting the infrared emission of a 14.85 µm quantum cascade laser, the sensor is working in an off-beam configuration ...
Diba Ayache, Wioletta Trzpil, Roman Rousseau, Kumar Kinjalk, Roland Teissier, Alexei N. Baranov, Michael Bahriz, Aurore Vicet   +7 more
openaire   +2 more sources

Correlation of trans-Lycopene Measurements by the HPLC Method with the Optothermal and Photoacoustic Signals and the Color Readings of Fresh Tomato Homogenates [PDF]

, 2009
The trans-lycopene content of fresh tomato homogenates was assessed by means of the laser photoacoustic spectroscopy, the laser optothermal window, micro-Raman spectroscopy, and colorimetry; none of these methods require the extraction from the product ...
Ksenija Marković, Charlotte van Twisk, Bicanic, D., Dane Bicanic, Bicanic, Dane, Bicanic, D.D., Dimitrovski, Darko, Buijnsters, J.G., Markovic, Ksenija, Buijnsters, Josephus Gerardus, van Twisk, C., Twisk, C., van, Otto Dóka, Luterotti, S., Luterotti, Svjetlana, Doka, O., Doka, Otto, Darko Dimitrovski, Dimitrovski, D., van Twisk, Charlotte, Svjetlana Luterotti, Markovic, K., Josephus G. Buijnsters, Twisk, C. van   +23 more
core   +1 more source

Multiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy based on a single-line spot pattern multi-pass cell

, 2021
International audienceMultiple-sound-source-excitation quartz-enhanced photoacoustic spectroscopy (MSSE-QEPAS) based on a single-line spot pattern multi-pass cell (MPC) is reported for trace gas detection.
Ruyue Cui, Dong, Lei, Weidong Chen, Cui, Ruyue, Frank K. Tittel, Hongpeng Wu, Lei Dong, Chen, Weidong, Tittel, Frank, Wu, Hongpeng   +9 more
core   +1 more source

A Reproducible MRI‐Based Pipeline for Longitudinal Tracking of Laser‐Assisted Bioprinted Cells in Three‐Dimensional Constructs

NMR in Biomedicine, Volume 39, Issue 10, October 2026.
Laser‐assisted bioprinting was used to deposit iron oxide‐labelled endothelial cells in predefined patterns onto SCAP‐seeded gelatin biopapers to assemble multilayer constructs of increasing thickness. T2*‐weighted MRI monitored constructs for up to 35 days.
Mina Medojević, Charles Handschin, Ayako Washio, Malou Lea, Laurence Dallet, Aleksandar Jakovljević, Emeline J. Ribot, Olivia Kérourédan   +7 more
wiley   +1 more source

Dual-frequency modulated heterodyne quartz-enhanced photoacoustic spectroscopy

Optics Express, 2023
A novel dual-frequency modulated heterodyne quartz-enhanced photoacoustic spectroscopy (DFH-QEPAS) was demonstrated for what we believe to be the first time in this study. In traditional H-QEPAS, the frequency of modulated sinusoidal wave has a frequency difference (Δ f ) with the resonance ...
Ziting Lang, Shunda Qiao, Tiantian Liang, Ying He, Lei Qi, Yufei Ma   +5 more
openaire   +2 more sources

Light intensity correction for quartz-enhanced photoacoustic spectroscopy using photothermal baseline

Frontiers in Physics, 2022
A convenient method of light intensity correction for quartz-enhanced photoacoustic spectroscopy (QEPAS) using photothermal baseline is demonstrated. The laser beam passes through the prongs of the quartz tuning fork (QTF) and then focused on the root of
Xiang Chen, Xiang Chen, Mai Hu, Mai Hu, Hao Liu, Hao Liu, Lu Yao, Zhenyu Xu, Ruifeng Kan   +8 more
doaj   +1 more source

BODIPY‐based J‐aggregates: From supramolecular chemistry to NIR bioimaging and phototherapies

Bulletin of the Korean Chemical Society, Volume 47, Issue 8, Page 951-982, August 2026.
BODIPY dyes form ordered J‐aggregates through controlled supramolecular self‐assembly, producing narrow, red‐shifted absorption bands with small Stokes shifts. This review highlights design strategies governing J‐aggregation, structure–property relationships, and applications in sensing, bioimaging, and phototherapy, guiding functional BODIPY‐based ...
Pooja Sharma, Yeonkyeong Lee, Youngmi Kim   +2 more
wiley   +1 more source

Conductance-photoacoustic spectroscopy for fast and concurrent sensing of hydrogen and hydrocarbons

Photoacoustics
Accurate and rapid detection of hydrogen and hydrocarbons is critical for safety and efficiency in modern energy, industrial, and environmental systems.
Ruobin Zhuang, Jianfeng He, Haoyang Lin, Huijian Luo, Leqing Lin, Lihao Wang, Bin Liu, Wenguo Zhu, Yongchun Zhong, Jianhui Yu, Markus Sigrist, Huadan Zheng   +11 more
doaj   +1 more source

Mid-infrared intracavity quartz-enhanced photoacoustic spectroscopy with pptv – Level sensitivity using a T-shaped custom tuning fork

Photoacoustics, 2022
Resonant optical power buildup inside a high finesse cavity is exploited to boost the sensitivity in quartz-enhanced photoacoustic spectroscopy (QEPAS) for CO, N2O and H2O detection, operating at a wavelength of 4.59 µm.
Jakob Hayden, Marilena Giglio, Angelo Sampaolo, Vincenzo Spagnolo, Bernhard Lendl   +4 more
doaj   +1 more source