ArticlePhotoacoustics2024
Sub-ppb level HCN photoacoustic sensor employing dual-tube resonator enhanced clamp-type tuning fork and U-net neural network noise filter.
Article in Photoacoustics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed.
- Intelligent Algorithm-Assisted Indirect Absorption Spectroscopy for Trace Gas Sensing.Sensors (Basel, Switzerland) · 2026Review
- Simultaneous detection of methane and carbon dioxide in human exhalation based on photoacoustic spectroscopy.Photoacoustics · 2026Article
- Thermally activated excess noise by subgap density-of-states in Si-doped ZnSnO thin-film transistor-type gas sensor.Microsystems & nanoengineering · 2026Article
- High-Flow-Rate Trace Formaldehyde Detection Based on Ultraviolet Photoacoustic Spectroscopy Using a Long Resonant Photoacoustic Cell.Sensors (Basel, Switzerland) · 2026Article
- Highly Sensitive CHSensors (Basel, Switzerland) · 2026Article
- Topological optimization method "MMA-BP" for photoacoustic resonator and implementations in ppt-level gas sensor using miniaturized vase-type photoacoustic cells.Photoacoustics · 2025Article
- Ppb-level formaldehyde sensor utilizing a compact 3D-printed differential photoacoustic cell and a 320 nm UV laser.Photoacoustics · 2025Article
- Enhancing photoacoustic trace gas detection via a CNN-transformer denoising framework.Photoacoustics · 2025Article
- Sensitivity improvement of quartz-enhanced photoacoustic spectroscopy using the stochastic resonance method.Photoacoustics · 2025Article
- Gas concentration prediction in photoacoustic spectroscopy using PSO-EAP-CNN to address correlation degradation.Photoacoustics · 2025Article
- All-Fiber LITES Sensor Based on Hollow-Core Anti-Resonant Fiber and Self-Designed Low-Frequency Quartz Tuning Fork.Sensors (Basel, Switzerland) · 2025Article
- Highly sensitive HPhotoacoustics · 2025Article
- A sulfur dioxide detection platform based on photoacoustic spectroscopy and a 266.22 nm high-power stabilized LD-pumped solid-state Q-switched laser.Photoacoustics · 2025Article
- LITES-Based Sensitive COSensors (Basel, Switzerland) · 2025Article
- Advances in Gas Detection of Pattern Recognition Algorithms for Chemiresistive Gas Sensor.Materials (Basel, Switzerland) · 2024Review
- A Review on Photoacoustic Spectroscopy Techniques for Gas Sensing.Sensors (Basel, Switzerland) · 2024Review
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Authors and funding
12 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Hydrogen cyanide (HCN) is a toxic industrial chemical, necessitating low-level detection capabilities for safety and environmental monitoring. This study introduces a novel approach for detecting hydrogen cyanide (HCN) using a clamp-type custom quartz tuning fork (QTF) integrated with a dual-tube acoustic micro-resonator (AmR) for enhanced photoacoustic gas sensing. The design and optimization of the AmR geometry were guided by theoretical simulation and experimental validation, resulting in a robust on-beam QEPAS (Quartz-Enhanced Photoacoustic Spectroscopy) configuration. To boost the QEPAS sensitivity, an Erbium-Doped Fiber Amplifier (EDFA) was incorporated, amplifying the laser power by approximately 286 times. Additionally, a transformer-based U-shaped neural network, a machine learning filter, was employed to refine the photoacoustic signal and reduce background noise effectively. This combination yielded a significantly low detection limit for HCN at 0.89 parts per billion (ppb) with a rapid response time of 1 second, marking a substantial advancement in optical gas sensing technologies. Key modifications to the QTF and innovative use of AmR lengths were validated under various experimental conditions, affirming the system's capabilities for real-time, high-sensitivity environmental monitoring and industrial safety applications. This work not only demonstrates significant enhancements in QEPAS but also highlights the potential for further technological advancements in portable gas detection systems.
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