Results 71 to 80 of about 1,607 (170)

Quartz-Enhanced Photoacoustic Spectroscopy for Four-Component Gas Detection Based on Two Off-Beam Acoustic Microresonators

Frontiers in Physics, 2020
A compact and portable quartz-enhanced photoacoustic spectroscopy gas sensor was developed for four-component gas detection using two off-beam acoustic microresonators The two AMRs were placed in parallel on opposing sides of a quartz tuning fork for ...
Cheng Wang, Zongliang Wang, Xiyu Pang
doaj   +1 more source

Aggregation‐Enhanced Asymmetric Heptamethine Cyanine Nanoplatform for Imaging‐Guided Synergistic Phototherapy and Ferroptosis

Aggregate, Volume 6, Issue 12, December 2025.
An asymmetric heptamethine cyanine photosensitizer, Cyp‐TPE, is designed to break molecular symmetry and form ordered nanoaggregates, resulting in ultrahigh ROS generation and synergistic photothermal/photodynamic activity. It further triggers ferroptosis and lysosomal dysfunction, providing a potent aggregate‐based theranostic platform for imaging ...
Mengyuan Cui, Wenqing Li, Yanli Chen, Huijia Liu, Li Liu, Min Ji, Peng Wang   +6 more
wiley   +1 more source

Off-beam quartz-enhanced photoacoustic spectroscopy with LEDs

, 2022
S.227-232A photoacoustic ozone sensor based on quartz-enhanced photoacoustic spectroscopy is presented. Instead of a laser, a UV-LED at 285 nm is utilized as light source.
Schade, W., Böttger, S., Willer, U., Köhring, M.   +3 more
core   +1 more source

Miniaturized and highly-sensitive fiber-optic photoacoustic gas sensor based on an integrated tuning fork by mechanical processing with dual-prong differential measurement

Photoacoustics, 2023
A proof-of-concept gas sensor based on a miniaturized and integrated fiber-optic photoacoustic detection module was introduced and demonstrated for the purpose of developing a custom tuning-fork (TF)-enhanced photoacoustic gas sensor.
Yufeng Pan, Ping Lu, Lin Cheng, Zhenyu Li, Dongchao Liu, Jinbiao Zhao, Yuxuan Wang, Lujun Fu, Chaotan Sima, Deming Liu   +9 more
doaj   +1 more source

Advances in metals and metal hybrids‐based gas sensors and their applications

Rare Metals, Volume 44, Issue 12, Page 9363-9413, December 2025.
Graphical abstract Abstract As a kind of node on the Internet of Things, gas sensor is specifically utilized for detecting gaseous chemical species and humidity. Functioning as a kind of discrete electronic components, gas sensors have been extensively implemented in many fields, including agricultural production, public safety, healthcare activity ...
Danyao Qu, Bolang Cheng, Xinyi Shao, Jinyong Hu, Suo Bai, Yong Zhang, Weiwei Wu, Hossam Haick   +7 more
wiley   +1 more source

High-sensitivity methane detection based on QEPAS and H-QEPAS technologies combined with a self-designed 8.7 kHz quartz tuning fork

Photoacoustics
Methane (CH4) is a greenhouse gas as well as being flammable and explosive. In this manuscript, quartz-enhanced photoacoustic spectroscopy (QEPAS) and heterodyne QEPAS (H-QEPAS) exploring a self-designed quartz tuning fork (QTF) with resonance frequency (
Tiantian Liang, Shunda Qiao, Yanjun Chen, Ying He, Yufei Ma   +4 more
doaj   +1 more source

Quartz Enhanced Photoacoustic Spectroscopy Based Gas Sensor with a Custom Quartz Tuning Fork

Proceedings, 2018
We have fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency, a larger gap between the prongs and the best quality factor in air at atmospheric conditions ever reported.
Maxime Duquesnoy, Guillaume Aoust, Jean-Michel Melkonian, Raphaël Lévy, Myriam Raybaut, Antoine Godard   +5 more
doaj   +1 more source

Transition Metal Nitrides: Multifunctional Catalysts and Energy Materials with Tailorable Architectures

Small Science, Volume 5, Issue 11, November 2025.
This article discusses the preparation methods, structural engineering, and key properties of transition metal nitrides, as well as their versatile applications in supercapacitors, rechargeable batteries, electrocatalytic and photocatalytic processes, and solar cell technologies.
Narasimharao Kitchamsetti, Ana L.F. de Barros, Sungwook Mhin   +2 more
wiley   +1 more source

Quartz-Enhanced Photoacoustic Sensors for Environmental Monitoring

, 2023
Atmospheric composition affects climate, human health, terrestrial and aquatic ecosystems, and is dramatically influenced by human activities. Environmental gas monitoring of pollutant and greenhouse gases in atmosphere are thus fundamental to ...
Sampaolo, Angelo, Giglio, Marilena, Spagnolo, Vincenzo, Elefante, Arianna, Patimisco, Pietro   +4 more
core   +1 more source

Rational Design and Fabrication of MEMS Gas Sensors With Long‐Term Stability: A Comprehensive Review

Advanced Science, Volume 12, Issue 39, October 20, 2025.
Recent advances in microelectromechanical systems (MEMS) gas sensors are reviewed, emphasizing strategies to enhance long‐term stability, including chemical modification of sensing films and device structural optimization. Key challenges and future opportunities are also highlighted.
Chao Zhang, Tianyi Wang, Guozhu Zhang, Rui Gao, Chengze Gao, Zeyu Wang, Fuzhen Xuan   +6 more
wiley   +1 more source