Results 71 to 80 of about 3,338,318 (170)
PhotonicsDissolved gas analysis (DGA) is an essential technique for the fault diagnosis and condition monitoring of oil-immersed power transformers. Among various characteristic gases, acetylene (C2H2) is a key indicator of high-energy discharge and arc faults ...
Yihua Qian +5 more
doaj +1 more source
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
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Hydrogen Halide Gas Sensors: Active Materials, Operation Principles, and Emerging Technologies
Interdisciplinary Materials, Volume 5, Issue 1, Page 85-123, January 2026.This review considers hydrogen halide (HX) gas sensors across functional materials and principles: acoustic, chemical, optical and nanophotonic. The strong acidity and reactivity of HX gases are discussed as constraints for stability and selectivity of these devices.
Xiuzhen Liu +12 more
wiley +1 more source
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 +9 more
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IET Science, Measurement &Technology, Volume 20, Issue 1, January/December 2026.ABSTRACT Nanosensors represent a cornerstone of modern nanomedicine, enabling ultrasensitive, real‐time biosensing that bridges diagnostics and therapeutics towards personalised and proactive healthcare. This comprehensive review systematically examines the core principles of advanced nanosensors, including their classification by transduction ...
Mokhtar Aarabi, Haniyeh Faraji Azad
wiley +1 more source
PhotoacousticsMethane (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 +4 more
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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 +5 more
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Journal of Analytical Methods in Chemistry, Volume 2026, Issue 1, 2026.Exhaled breath analysis (EBA) has evolved as a noninvasive diagnostic technique with enormous promise in healthcare. The development in this area is based on the concept that the breathalyzers employed to measure the alcohol concentration in the blood can be utilized to evaluate health by analyzing the intricate chemical makeup of exhaled breath, which
Nisha Parikh +11 more
wiley +1 more source
ChemPhotoChem, Volume 9, Issue 12, December 13, 2025.Tetra‐ortho‐fluoroazobenzene hybrids bound to carbon nanodots (CNDs) are prepared by covalent amide coupling. These show reversible switching between trans and cis using visible light (448 nm/530 nm), while retaining emission. The hybrids are nontoxic to cells and enable optical stimulation and offering potential for advanced light‐controlled ...
Paul P. Debes +14 more
wiley +1 more source
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 +6 more
wiley +1 more source