Facile physical entrapment of halochromic dye via UV-photografting for the fabrication of colorimetric cotton sensors to detect toxic ammonia gas

Progress in Organic Coatings, Год журнала: 2024, Номер 192, С. 108450 - 108450

Опубликована: Апрель 27, 2024

Textile-based halochromic gas sensors are useful for detecting volatile organic compounds (VOCs) such as ammonia, because they undergo changes that distinguishable to the naked eye. Herein, we report UV photografting system developed fabrication of cotton with reduced amounts salt, resources, and effluents. First, 4-hydroxycoumarin-based dye (HD) was synthesized a indicator, where after dye, monomer, photoinitiators were introduced bath fabricate system. This produced by grafting monomers on fiber surface under light irradiation formulate polymer network entraps molecules. A series different monomer concentrations bath. Subsequently, dyeability detection performance fabricated evaluated. In addition, fastness reusability tests performed ensure durable sustainable. The increased concentration color change upon exposure ammonia followed same tendency. sensor prepared highest underwent distinctive 300 s (ΔE > 15). Furthermore, exhibited remarkable durability washing (wash level: 5, ΔE maintenance rate washing: ∼85 %) rubbing (rubbing 4/5, rubbing: ∼95 %). Reusability testing showed property retained repeated (10 cycles). results confirmed UV-induced had been optimized suggested offered an eco-friendly alternative conventional dyeing textile sensors.

Язык: Английский

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Influence of the Pd Oxidation State in PdNi Thin Films on Surface Acoustic Wave Hydrogen Sensing Performance

ACS Sensors, Год журнала: 2024, Номер 9(5), С. 2395 - 2401

Опубликована: Май 9, 2024

PdNi alloy thin films demonstrate exceptional hydrogen sensing performance and exhibit significant potential for application in surface acoustic wave (SAW) sensors. However, the long-term stability of SAW H2 sensors utilizing as catalysts experiences a substantial decrease during operation. In this paper, X-ray photoelectron spectroscopy (XPS) is employed to investigate failure mechanisms under operational conditions. The XPS analysis reveals that formation PdO species on plays crucial role sensing. Additionally, density functional theory (DFT) calculations indicate atoms encounter diffusion energy barrier penetration process from PdNiOx subsurface region. identification film through DFT offers valuable insights into development gas with enhanced stability. Guided by these mechanisms, we propose method restore response time magnitude certain extent reducing partially oxidized atmosphere at 70 °C, thereby restoring Pd its metallic state zero valence.

Язык: Английский

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Flexible Hybrid Nanostructured Chemiresistive Sensing Platform for Low-Temperature Trace Hydrogen Detection

Sensors and Actuators B Chemical, Год журнала: 2024, Номер 422, С. 136621 - 136621

Опубликована: Сен. 10, 2024

Язык: Английский

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High-Aspect-Ratio In_2–xGa_xO₃ Integrated with Amorphous Al₂O₃ Nanofibers: All-Inorganic Self-Supporting Wearable Membranes for Ultralow-Concentration NO Sensing in Simulated Exhalation

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

Achieving high flexibility, breathability, and sensitivity in inorganic semiconductor gas sensors remains a substantial challenge, especially for wearable applications high-humidity environments. This study develops hyper-flexible, thermally stable, highly breathable full-inorganic, self-supporting In2–xGaxO3–Al2O3/Al2O3 nanofiber membrane sensor, fabricated using dual-spinneret electrospinning method with an interlocking design. innovative sensor has bilayer structure amorphous Al2O3 substrate layer supporting active of high-aspect-ratio interwoven In2–xGaxO3 nanofibers, providing outstanding elevated strong thermal stability. Owing to low-concentration Ga3+ doping its nanofiber-built porous design, the In1.98Ga0.02O3–Al2O3/Al2O3 demonstrates excellent sensitivity, selectivity, cycling stability detecting ultralow-concentration NO biomarker (≈15 ppb) under simulated breath conditions, without performance deterioration, even after 10000 large-angle bending cycles. work advances universal fabrication high-performance, full-inorganic breath-based diagnostic applications.

Язык: Английский

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Nanosensors Based on Breathomics for Human Disease Diagnosis: a New Frontier in Personalized Healthcare

BioNanoScience, Год журнала: 2025, Номер 15(2)

Опубликована: Март 14, 2025

Язык: Английский

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A room temperature hydrogen sensor based on 3D self-assembled nanosheets-frame ZnO

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 105, С. 797 - 805

Опубликована: Янв. 28, 2025

Язык: Английский

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All-Fiber Multicomponent Gas Raman Probe Based on Platinum-Coated Capillary Enhanced Raman Spectroscopy

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Янв. 30, 2025

This paper presents a compact all-fiber multicomponent gas Raman probe using dual-fiber architecture within platinum-coated capillary. The eliminates the need for conventional optical components like filters and dichroic mirrors by strategically employing metal coating on excitation fiber's surface to suppress interference signals. A detailed analysis of silica signal fluorescence propagation system facilitated this design. Metal-coated capillary (MCC), produced via atomic layer deposition (ALD) platinum capillaries, exhibits excellent properties environmental resilience, boosting reception. Careful alignment dual fibers relative optimizes signal-to-noise ratio enhancement. achieves detection limits 21 ppm CH4, 30 C2H4, 51 C2H6 45 s exposure, alongside rapid response time 25 (relative systems based hollow-core antiresonant fibers) robust stability. Its streamlined path design enhance practicality across diverse fields, including agriculture, industry, monitoring, healthcare, advancing technology.

Язык: Английский

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Room Temperature Operated Flexible MWCNTs/Nb2O5 Hybrid Breath Sensor for the Non-Invasive Detection of Exhaled Diabetes Biomarker

Journal of Materials Chemistry B, Год журнала: 2025, Номер 13(10), С. 3460 - 3470

Опубликована: Янв. 1, 2025

Flexible gas/breath sensors have emerged as a transformative solution in personalized healthcare, offering innovative approaches for remote, non-invasive, and continuous monitoring of health indicators from breath samples.

Язык: Английский

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Atomic Ru Species Driven SnO₂-Based Sensor for Highly Sensitive and Selective Detection of H₂S in the ppb-Level

ACS Sensors, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Timely and accurate detection of H2S is crucial for preventing serious health issues in both humans livestock upon exposure. However, metal-oxide-based sensors often suffer from mediocre sensitivity, poor selectivity, or long response/recovery time. Here, an atomic Ru species-driven SnO2-based sensor fabricated to realize highly sensitive selective at the parts per billion level as low 100 ppb. The shows a high sensing response (Rair/Rgas = 310.1) ultrafast time (less than 1 s) 20 ppm operating temperature 160 °C. Operando SR-FTIR spectroscopic characterizations DFT calculations prove that superior properties can be mainly attributed driven effect species on formation surface-adsorbed oxygen surface SnO2, which provides more active sites enhances performance SnO2 H2S. Furthermore, lab-made wireless portable monitoring system developed rapidly detect early warning, suggesting potential application system. This work novel approach fabricating gas by metal loaded metal-oxide semiconductors.

Язык: Английский

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Advances in semiconductor-based sensors for hazardous gas detection in coal mines

Alexandria Engineering Journal, Год журнала: 2025, Номер 121, С. 452 - 464

Опубликована: Март 6, 2025

Язык: Английский

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