Recent Advancements in Development of Wearable Gas Sensors

Advanced Materials Technologies, Journal Year: 2021, Volume and Issue: 6(3)

Published: Feb. 4, 2021

Abstract In the era of Internet Things, wearable technologies are expected to become an indispensable part daily life. recent times, highly sensitive, flexible, and stretchable electronic gas sensors gaining tremendous interest due their applicability in electronics applications. The construction reviewed for real‐time, selective detection hazardous gases at room temperature (RT) that can be laminated onto a human body or integrated with body‐worn textile other consumer products, utilizing carbon nanomaterials, conductive polymers, 2D nanostructured materials, composites. Sensing transduction techniques, substrates high‐performance sensing discussed detail. critical challenges future development presented. Wearable believed have great potential environmental monitoring, healthcare, public safety, security, as well food quality monitoring.

Language: Английский

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Advances in cost-effective integrated spectrometers

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: June 7, 2022

Abstract The proliferation of Internet-of-Things has promoted a wide variety emerging applications that require compact, lightweight, and low-cost optical spectrometers. While substantial progresses have been made in the miniaturization spectrometers, most them are with major focus on technical side but tend to feature lower technology readiness level for manufacturability. More importantly, spite advancement miniaturized their performance metrics real-life seldomly connected highly important. This review paper shows market trend chip-scale spectrometers analyzes key required adopt applications. Recent progress addressing challenges is summarized, paying special attention CMOS-compatible fabrication platform clear pathway massive production. Insights ways forward also presented.

Language: Английский

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Recent Progress in Amine Gas Sensors for Food Quality Monitoring: Novel Architectures for Sensing Materials and Systems

ACS Sensors, Journal Year: 2022, Volume and Issue: 7(8), P. 2104 - 2131

Published: Aug. 1, 2022

The increasing demand for food production has necessitated the development of sensitive and reliable methods analysis, which allow optimization storage distribution while ensuring safety. Methods to quantify monitor volatile biogenic amines are key minimizing waste high-protein foods enable safe consumption fresh products. Novel materials device designs have allowed portable sensors that make use different transduction amine detection quality monitoring. Herein, we review past decade's advances in First, role as a food-quality index is presented. Moreover, comprehensive overview distinct gas provided according method, operation strategies, (e.g., metal oxide semiconductors, conjugated polymers, carbon nanotubes, graphene its derivatives, transition dichalcogenides, organic frameworks, MXenes, quantum dots, dyes, among others) employed each case. These include chemoresistive, fluorometric, colorimetric, microgravimetric sensors. Emphasis also given sensor arrays record fingerprints wireless devices operate radiofrequency identification (RFID) tags. Finally, challenges future opportunities on new presented aiming encourage further research technological reliable, integrated, remotely accessible

Language: Английский

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Visible-Light-Activated Response Originating from Carrier-Mobility Modulation of NO₂ Gas Sensors Based on MoS₂ Monolayers

ACS Nano, Journal Year: 2021, Volume and Issue: 15(2), P. 2542 - 2553

Published: Feb. 2, 2021

Some gas sensors exhibit significant increases in their sensitivity and response/recovery rates under light illumination. This photoactivation of the response is considered a promising alternative to conventional thermal activation, which requires high power consumption. Thin layers molybdenum disulfide (MoS2) are known an effective photoactivated visible light. However, mechanism has not yet been studied detail. In this study, we fabricated field-effect-transistor (FET) based on MoS2 monolayers investigated responses NO2 illumination at various irradiances A photocurrent was generated mainly due photovoltaic effect, decreased upon exposure NO2. The conductance-based sensor showed dependence concentration according Langmuir adsorption isotherm, thereby suggesting that proportional surface coverage molecules layer. recovery linear increase with increasing irradiance. Analysis model revealed both photostimulated desorption involved response. contrast, despite strong irradiance, magnitude independent Based result change transfer characteristics FET during exposure, concluded fast carrier mobility modulation MoS2, caused by dipole scattering adsorbed molecules.

Language: Английский

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Carbon-based nanomaterials for the detection of volatile organic compounds: A review

Carbon, Journal Year: 2021, Volume and Issue: 180, P. 274 - 297

Published: May 12, 2021

Language: Английский

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Wearable Sensors for Remote Health Monitoring: Potential Applications for Early Diagnosis of Covid‐19

Advanced Materials Technologies, Journal Year: 2021, Volume and Issue: 7(1)

Published: Sept. 3, 2021

Abstract Wearable sensors are emerging as a new technology to detect physiological and biochemical markers for remote health monitoring. By measuring vital signs such respiratory rate, body temperature, blood oxygen level, wearable offer tremendous potential the noninvasive early diagnosis of numerous diseases Covid‐19. Over past decade, significant progress has been made develop with high sensitivity, accuracy, flexibility, stretchability, bringing reality paradigm In this review paper, latest advances in sensor systems that can measure at an accuracy level matching those point‐of‐care tests presented. particular, focus is placed on behavior, which identified critical signals diagnosing monitoring Various designs based different materials working mechanisms summarized. This concluded by identifying remaining challenges future opportunities field.

Language: Английский

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Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Sensors, Journal Year: 2022, Volume and Issue: 22(3), P. 1238 - 1238

Published: Feb. 6, 2022

Early-stage disease diagnosis is of particular importance for effective patient identification as well their treatment. Lack compliance the existing diagnostic methods, however, limits prompt diagnosis, rendering development non-invasive tools mandatory. One most promising methods that has also attracted great research interest during last years breath analysis; method detects gas-analytes such exhaled volatile organic compounds (VOCs) and inorganic gases are considered to be important biomarkers various disease-types. The ability gas-pattern detection using analytical techniques especially sensors been widely discussed in literature; incorporation novel nanomaterials sensor-development proved enhance sensor performance, both selective cross-reactive applications. aim first part this review provide an up-to-date overview main categories studied applications via highlight role nanomaterials. second concentrates on remarkable applicability analysis differential phenotyping, staging several disease-types, which currently amongst pressing challenges field.

Language: Английский

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Oxygen Vacancy-Rich Bimetallic Au@Pt Core–Shell Nanosphere-Functionalized Electrospun ZnFe₂O₄ Nanofibers for Chemiresistive Breath Acetone Detection

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(4), P. 2183 - 2193

Published: April 8, 2024

Sensitive and selective acetone detection is of great significance in the fields environmental protection, industrial production, individual health monitoring from exhaled breath. To achieve this goal, bimetallic Au@Pt core–shell nanospheres (BNSs) functionalized-electrospun ZnFe2O4 nanofibers (ZFO NFs) are prepared work. Compared to pure NFs-650 analogue, ZFO NFs/BNSs-2 sensor exhibits a stronger mean response (3.32 vs 1.84), quicker response/recovery speeds (33 s/28 s 54 s/42 s), lower operating temperature (188 273 °C) toward 0.5 ppm acetone. Note that an experimental limit 30 ppb achieved, which ranks among best cases reported thus far. Besides demonstrated excellent repeatability, humidity-enhanced response, long-term stability, selectivity remarkably improved after BNSs functionalization. Through material characterizations DFT calculations, all these improvements could be attributed boosted oxygen vacancies abundant Schottky junctions between NFs BNSs, synergistic catalytic effect BNSs. This work offers alternative strategy realize subppm under high-humidity conditions catering for future requirements noninvasive breath diabetes diagnosis field healthcare.

Language: Английский

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Recent progress in surface and heterointerface engineering of 2D MXenes for gas sensing applications

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 500, P. 215542 - 215542

Published: Nov. 15, 2023

Language: Английский

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Carbon Nanostructure Embedded Novel Sensor Implementation for Detection of Aromatic Volatile Organic Compounds: An Organized Review

ACS Omega, Journal Year: 2023, Volume and Issue: 8(5), P. 4436 - 4452

Published: Jan. 23, 2023

For field-like environmental gas monitoring and noninvasive illness diagnostics, effective sensing materials with exceptional capabilities of sensitive, quick detection volatile organic compounds (VOCs) are required. Carbon-based nanomaterials (CNMs), like CNTs, graphene, carbon dots (Cdots), others, have recently drawn a lot interest for their future application as an elevated-performance sensor the VOCs. CNMs greater potential developing selective sensors that target VOCs due to tunable chemical surface properties. Additionally, mechanical versatility enables development novel places them ahead other wearable applications. An overview latest advancements in study CNM-based is given this comprehensive organized review.

Language: Английский

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