High-Performance Gas Sensor based on Ag@SnO2-Co3O4 Hollow Nanocomposite for Fast and Highly Selective H2S Detection

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137239 - 137239

Опубликована: Янв. 1, 2025

Язык: Английский

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Ultrasensitive, Online Detection of Endogenous H2s by a Novel Ratiometric Fluorescent Approach

Опубликована: Янв. 1, 2025

Endogenous hydrogen sulfide (H2S) is a crucial biological signaling molecule in the mammals. Numerous H2S sensing methods have been developed, yet there remains an urgent need for portable, online and sensitive detection of complex samples. Herein, ratiometric fluorescent optical fiber sensor was designed ultrasensitive, H2S, using nanohybrids electrostatically self-assembled from silicon quantum dots gold nanoclusters (AuNCs@SiQDs nanohybrids). The nanohybrids, acting as probe, exhibited specific response to H2S. mechanism involved static quenching effect on AuNCs fluorescence resonance energy transfer between SiQDs AuNCs. showed good linear concentration 0.01 ~ 100 μM, with ultralow limit 4.33 nM. also successfully employed rapid real serum samples, without tedious preprocessing. This approach offers portable efficient technique on-line ultrasensitive measurement well determination H2S-mediated biomolecules. method boasts high sensitivity selectivity, strong anti-interference capability, portability, practicality, ease production, making it significant disease research emergency analysis.

Язык: Английский

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Catalytic Degradation by Metal–Organic Hybrid Nanocomposites Based on Metal/Metal Oxide Nanostructured Materials Prepared by Pulsed Laser Ablation

Microscopy Research and Technique, Год журнала: 2025, Номер unknown

Опубликована: Апрель 16, 2025

ABSTRACT The heterojunction based on plasmonic metals of Ag and Cu in the oxide form was synthesized decorated carbon nanotubes to Ag‐Cu 2 O/MWCNTs nanocomposites via a pulsed laser ablation process for water treatment. This study presents synthesis characterization Ag/MWCNTs with different amounts O NPs using novel two‐step technique enhanced photocatalytic degradation Congo Red dye under UV–visible‐light irradiation. Structural optical techniques confirmed successful formation highly pure crystalline nanocomposites, coupling significantly visible‐light absorption, making effective applications, which were systematically evaluated varying pH, catalyst dosage, concentration, irradiation time conditions. results demonstrated that 60 min (30min 30 Ag), O/MWCNTs(2), achieved highest efficiency 99.43% (CR) at pH 8.0 an optimal dosage. Kinetic studies mechanism revealed photodegradation followed Langmuir‐Hinshelwood pseudo‐first‐order model, O/MWCNTs(2) exhibiting fastest rate, outperforming other samples by degrading CR dye. work underscores potential as efficient photocatalysts environmental remediation, particularly organic pollutants wastewater. findings provide valuable insights into optimizing processes practical offering promising solution sustainable treatment pollution control.

Язык: Английский

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Ultrasensitive, online detection of endogenous H2S by a novel ratiometric fluorescent approach

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137874 - 137874

Опубликована: Апрель 1, 2025

Язык: Английский

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Wafer-Scale Integration of Metal Oxide Nanocrystals on Gas Sensor Chips via Direct Lithographic Patterning

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Nanomaterial-based gas sensors are essential due to their high sensitivity and scalability, enabling efficient detection across diverse applications. However, a key challenge hindering practical applications is the variation in sensing performance between devices. Addressing this requires careful consideration of relationship on-chip materials miniaturized As feature sizes reduce microscale, accurately uniformly positioning nanomaterials onto specific regions device electrodes becomes increasingly difficult. This arises from incompatibility bottom-up nanomaterial synthesis methods top-down lithography-based fabrication processes. Herein, we introduce cleanroom-compatible workflow for chemiresistive employing direct lithographic patterning metal oxide nanocrystals. Gas located different 4 in. wafer exhibit highly consistent gas-sensing performances, highlighting potential approach, which integrates strengths both approaches. approach opens new opportunities integrating wide range synthesized functional into types chemical sensors.

Язык: Английский

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A study of the stability and repeatability of U-shaped plastic optical fibers functionalized with gold nanoparticles for refractive index measurement

Optical Materials, Год журнала: 2024, Номер 150, С. 115265 - 115265

Опубликована: Март 25, 2024

Язык: Английский

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Recent Advances in Laser Manufacturing: Multifunctional Integrative Sensing Systems for Human Health and Gas Monitoring

Advanced Functional Materials, Год журнала: 2024, Номер 34(45)

Опубликована: Авг. 22, 2024

Abstract Since its first application in the 1950s, laser has become an indispensable tool scientific research and manufacturing. Laser manufacturing includes traditional methods such as cutting engraving emerging laser‐induced surface modification, materials transfer, ablation synthesis. is widely applied fabrication of multifunctional sensing systems. Compared with other lithography, vacuum deposition, etching processes, technology several advantages, including maskless patterning, high precision, non‐contact processing, minimum heat affected zone, throughput, ability to work multiple materials, ease automation integration. Here, this review aims present a comprehensive analysis applications various components health gas monitoring Emphasis placed on biosensors, microchannels, circuits, working electrodes. Subsequently, physical sensors introduced. Meanwhile, methods, material synthesis are Finally, challenges prospects systems discussed.

Язык: Английский

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Flexible fiber optic sensor for dual parameter perception of liquid level and temperature

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Апрель 15, 2024

In this paper, a flexible optical fiber for two-parameter measurement of liquid level and temperature is presented. The composed polyurethane membrane spherical microfiber few mode (FMF) . It has excellent mechanical properties thermal stability. By converting the change into static pressure diaphragm, performance sensor analyzed by finite element method (FEM) beam propagation (BPM). sensitivity 0.54534 nm/mm, increased about 5 times. order to eliminate interference, decoupling scheme studied in paper. problem cross solved discussing interference on double wave peaks. broad prospect field fuel monitoring control.

Язык: Английский

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Ultra-High Sensitivity Methane Gas Sensor Based on Cryptophane-A Thin Film Depositing in Double D-Shaped Photonic Crystal Fiber Using the Vernier Effect

Sensors, Год журнала: 2024, Номер 24(24), С. 8132 - 8132

Опубликована: Дек. 19, 2024

Methane gas leakage can lead to pollution problems, such as rising ambient temperature. In this paper, the Vernier effect of a double D-shaped photonic crystal fiber (PCF) in Sagnac interferometer (SI) is proposed for accurate detection mixed methane content gas. The optical structure effective sensing SI loop and reference are same. Both them adopt polarization-maintaining (PM-PCF) designed paper. deposited with gas-sensitive film polished obtain double-D structure. This operation makes it easier contact sensitive realize sensor’s repeated use. capability sensor was evaluated utilizing finite element method (FEM). numerical simulation results show that when concentration environment 0~3.5%, average sensitivity two parallel loops 409.43 nm/%. Using cascade loops, detecting increased by four times. Without considering air humidity, we provide practical scheme development design high-sensitivity sensors.

Язык: Английский

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Blueprinted from Nature: Duplicating the Surface of Xanthosoma Sagittifolium Leaf on Uv-Curable Electroactive Polymethacrylate Film Through Biomimicking Technique for H2s Gas Sensing

Опубликована: Янв. 1, 2024

Язык: Английский

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