Recent Advances in Flexible Pressure Sensors Based on MXene Materials

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Фев. 21, 2024

In the past decade, with rapid development of wearable electronics, medical health monitoring, Internet Things, and flexible intelligent robots, pressure sensors have received unprecedented attention. As a very important kind electronic component for information transmission collection, gained wide application prospect in fields aerospace, biomedical skin, human-machine interface. recent years, MXene has attracted extensive attention because its unique 2D layered structure, high conductivity, rich surface terminal groups, hydrophilicity, which brought new breakthrough sensing. Thus, it become revolutionary pressure-sensitive material great potential. this work, advances MXene-based are reviewed from aspects sensing type, mechanism, selection, structural design, preparation strategy, application. The methods strategies to improve performance analyzed details. Finally, opportunities challenges faced by discussed. This review will bring research level, promoting wider exploitation practical materials sensors.

Язык: Английский

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In Situ Polymerized MXene/Polypyrrole/Hydroxyethyl Cellulose-Based Flexible Strain Sensor Enabled by Machine Learning for Handwriting Recognition

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(4), С. 5811 - 5821

Опубликована: Янв. 17, 2023

Flexible strain sensors have significant progress in the fields of human–computer interaction, medical monitoring, and handwriting recognition, but they also face many challenges such as capture weak signals, comprehensive acquisition information, accurate recognition. can sense externally applied deformations, accurately measure human motion physiological record signal characteristics handwritten text. Herein, we prepare a sandwich-structured flexible sensor based on an MXene/polypyrrole/hydroxyethyl cellulose (MXene/PPy/HEC) conductive material PDMS substrate. The features wide linear detection range (0–94%), high sensitivity (gauge factor 357.5), reliable repeatability (>1300 cycles), ultrafast response–recovery time (300 ms), other excellent sensing properties. MXene/PPy/HEC detect activities, exhibiting performance measuring external changes real-time detection. In addition, signals English words, Arabic numerals, Chinese characters by volunteers measured unique characteristics. Through machine learning technology, different are successfully identified, recognition accuracy is higher than 96%. results show that has impact detection, health

Язык: Английский

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PDMS Film-Based Flexible Pressure Sensor Array with Surface Protruding Structure for Human Motion Detection and Wrist Posture Recognition

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(2), С. 2554 - 2563

Опубликована: Янв. 3, 2024

Flexible pressure sensors have been widely concerned because of their great application potential in the fields electronic skin, human–computer interaction, health detection, and so on. In this paper, a flexible sensor is designed, with polydimethylsiloxane (PDMS) films protruding structure as elastic substrate poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS)/cellulose nanocrystals (CNC) conductive-sensitive material. The has wide linear detection range (0–100 kPa), outstanding sensitivity (2.32 kPa–1), stability more than 2000 cycles. proven to be able detect human movements (finger bending, elbow etc.) small (breathing, pulse, etc.). addition, array can distribution judge shape object. A smart wristband equipped four designed. Among them, k-nearest neighbor (KNN) algorithm used classify data achieve high accuracy (99.52%) recognition seven kinds wrist posture. This work provides new opportunity fabricate simple, applications next-generation intelligent robotics.

Язык: Английский

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Ultrastretchable High-Conductivity MXene-Based Organohydrogels for Human Health Monitoring and Machine-Learning-Assisted Recognition

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(15), С. 19435 - 19446

Опубликована: Апрель 10, 2023

Conductive hydrogels as promising candidates of wearable electronics have attracted considerable interest in health monitoring, multifunctional electronic skins, and human-machine interfaces. However, to simultaneously achieve excellent electrical properties, superior stretchability, a low detection threshold conductive remains an extreme challenge. Herein, ultrastretchable high-conductivity MXene-based organohydrogel (M-OH) is developed for human monitoring machine-learning-assisted object recognition, which fabricated based on Ti3C2Tx MXene/lithium salt (LS)/poly(acrylamide) (PAM)/poly(vinyl alcohol) (PVA) hydrogel through facile immersion strategy glycerol/water binary solvent. The M-OH demonstrates remarkable stretchability (2000%) high conductivity (4.5 S/m) due the strong interaction between MXene dual-network PVA/PAM matrix incorporation LS, respectively. Meanwhile, sensor enables with sensitivity limit (12 Pa). Furthermore, pressure mapping image recognition technology, 8 × pixelated M-OH-based sensing array can accurately identify different objects accuracy 97.54% under assistance deep learning neural network (DNN). This work comprehensive performances high-conductive would further explore extensive potential application prospects personal healthcare, interfaces, artificial intelligence.

Язык: Английский

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Flexible Pressure Sensors in Human–Machine Interface Applications

Small, Год журнала: 2023, Номер 20(15)

Опубликована: Ноя. 27, 2023

Abstract Flexible sensors are highly flexible, malleable, and capable of adapting todifferent shapes, surfaces, environments, which opens a wide range ofpotential applications in the field human‐machine interface (HMI). Inparticular, flexible pressure as crucial member flexiblesensor family, widely used wearable devices, health monitoringinstruments, robots other fields because they can achieve accuratemeasurement convert into electrical signals. The mostintuitive feeling that bring to people is change ofhuman‐machine interaction, from previous rigid interaction suchas keyboard mouse such smart gloves, more inline with people's natural control habits. Many advanced pressuresensors have emerged through extensive research development, adaptto various application. Researchers been seeking enhanceperformance improving materials, sensingmechanisms, fabrication methods, microstructures. This paper reviews HMI recent years, mainlyincluding following aspects: current cutting‐edge pressuresensors; sensing mechanisms, substrate materials active materials; sensorfabrication, performances, their optimization methods; flexiblepressure for prospects.

Язык: Английский

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Conductive nanocomposite hydrogels for flexible wearable sensors

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(16), С. 9371 - 9399

Опубликована: Янв. 1, 2024

We present a comprehensive review of the recent research advances in field sensors based on hydrogels with nanofillers. The characteristics and design strategies nanofillers are highlighted multiple properties conductive nanocomposite described.

Язык: Английский

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All‐MXene‐Printed RF Resonators as Wireless Plant Wearable Sensors for In Situ Ethylene Detection

Small, Год журнала: 2023, Номер 19(24)

Опубликована: Март 10, 2023

Abstract Printed flexible electronics have emerged as versatile functional components of wearable intelligent devices that bridge the digital information networks with biointerfaces. Recent endeavors in plant sensors provide real‐time and situ insights to study phenotyping traits crops, whereas monitoring ethylene, fundamental phytohormone, remains challenging due lack scalable manufacturing ethylene sensors. Here all‐MXene‐printed radio frequency (RF) resonators are presented for wireless detection. The facile formation additive‐free MXene ink enables rapid, printed electronics, demonstrating decent printing resolution (2.5% variation), ≈30000 S m −1 conductivity mechanical robustness. Incorporation MXene‐reduced palladium nanoparticles (MXene@PdNPs) facilitates 1.16% response at 1 ppm 0.084 limit sensor tags attached on organ surfaces continuously profiling emission inform key transition biochemistry, potentially extending application enable hormone precision agriculture food industrial management.

Язык: Английский

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Triboelectric Nanogenerators Based on Super-Stretchable Conductive Hydrogels with the Assistance of Deep-Learning for Handwriting Recognition

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(27), С. 32993 - 33002

Опубликована: Июнь 29, 2023

Nowadays, wearable electronic devices are developing rapidly with the internet of things and human-computer interactions. However, there problems such as low power, short power supply time, difficulty in charging, leading to a limited range practical applications. In this paper, composite hydrogel composed polyacrylamide, hydroxypropyl methylcellulose, MXene (Ti3C2Tx) nanosheets was developed, which formed stable double-chain structure by hydrogen bonding. The configuration endows excellent properties, high strength, strong stretchability, electrical conductivity, strain sensitivity. Based on these characteristics, flexible multifunctional triboelectric nanogenerator (PHM-TENG) prepared using functional electrode. can collect biomechanical energy convert it 183 V maximum density 78.3 mW/m2. It is worth noting that PHM-TENG be applied green source for driving miniature electronics. Also, used an auto-powered sensor distinguishes letters, enabling monitoring under small conditions. This work anticipated provide avenue development new intelligent systems handwriting recognition.

Язык: Английский

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Polyaniline/ZnO heterostructure-based ammonia sensor self-powered by electrospinning of PTFE-PVDF/MXene piezo-tribo hybrid nanogenerator

Chemical Engineering Journal, Год журнала: 2024, Номер 496, С. 154226 - 154226

Опубликована: Июль 22, 2024

Язык: Английский

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Washable and Multifunctional Electronic Textiles Via In Situ Lamination for Personal Health Care

Advanced Fiber Materials, Год журнала: 2024, Номер 6(2), С. 458 - 472

Опубликована: Фев. 6, 2024

Язык: Английский

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