Results 51 to 60 of about 3,338,318 (170)

Review of Recent Advances in QEPAS-Based Trace Gas Sensing

Applied Sciences, 2018
Quartz-enhanced photoacoustic spectroscopy (QEPAS) is an improvement of the conventional microphone-based photoacoustic spectroscopy. In the QEPAS technique, a commercially available millimeter-sized piezoelectric element quartz tuning fork (QTF) is used
Yufei Ma
doaj   +1 more source

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

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

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

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

A Review of Breath Sensing for Disease Monitoring and Diagnosis: Breathomics, Artificial Intelligence, and Nanomaterials for the Future of Medicine

Advanced Sensor Research, Volume 5, Issue 7, July 2026.
Breathomics is established as a non‐invasive diagnostic strategy by combining volatile organic compound biomarkers, nanomaterial‐based sensor arrays, and AI‐driven classification. Key diseases, sensing materials, and analytical challenges are critically compared, revealing how portable, data‐enabled breath platforms are moving toward clinically useful ...
Anesu Nyabadza, Mayur Makhesana, Suman Chatterjee, Dermot Brabazon   +3 more
wiley   +1 more source