Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human–Machine Interfaces

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(43), С. 48907 - 48916

Опубликована: Окт. 25, 2022

Recently, wearable sensors and electronic skin systems have become prevalent, which can be employed to detect the movement status physiological signals of wearers. Here, a pressure sensor composed mesh-like micro-convex structure polydimethylsiloxane (PDMS), MXene nanosheet/Ag nanoflower (AgNF) films, flexible interdigital electrodes was designed by layer-by-layer (LBL) assembly. The unique microstructure PDMS effectively increases contact area improves sensitivity. Moreover, AgNFs were introduced into as "bridge," synergistic effect two further enhanced performance sensor. has high sensitivity (191.3 kPa-1), good stability (18,000 cycles), fast response/recovery time (80 ms/90 ms), low detection limit (8 Pa), so it used for all-round monitoring human body. Sensing arrays integrated with wireless transmitter an intelligent artificial spatial mapping human-computer interaction sensing. we develop smart glove simple method, combining 3D model accurate hand poses. This provides ideas somatosensory technology, leading health monitoring, rehabilitation training, personalized medicine.

Язык: Английский

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Wearable sensors for telehealth based on emerging materials and nanoarchitectonics

npj Flexible Electronics, Год журнала: 2023, Номер 7(1)

Опубликована: Июнь 2, 2023

Abstract Wearable sensors have made significant progress in sensing physiological and biochemical markers for telehealth. By monitoring vital signs like body temperature, arterial oxygen saturation, breath rate, wearable provide enormous potential the early detection of diseases. In recent years, advancements been achieved development based on two-dimensional (2D) materials with flexibility, excellent mechanical stability, high sensitivity, accuracy introducing a new approach to remote real-time health monitoring. this review, we outline 2D materials-based biosensors system. The review focused five types sensors, which were classified according their mechanism, such as pressure, strain, electrochemical, optoelectronic, temperature sensors. material capabilities impact performance operation sensor are outlined. fundamental principles mechanism well applications explored. This concludes by discussing remaining obstacles future opportunities emerging telehealth field. We hope that report will be useful individuals who want design it generate ideas.

Язык: Английский

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MXene Functionalized, Highly Breathable and Sensitive Pressure Sensors with Multi‐Layered Porous Structure

Advanced Functional Materials, Год журнала: 2023, Номер 33(19)

Опубликована: Март 17, 2023

Abstract Breathable, flexible, and highly sensitive pressure sensors have drawn increasing attention due to their potential in wearable electronics for body‐motion monitoring, human‐machine interfaces, etc. However, current are usually assembled with polymer substrates or encapsulation layers, thus causing discomfort during wearing (i.e., low air/vapor permeability, mechanical mismatch) restricting applications. A breathable flexible sensor is reported nonwoven fabrics as both the electrode (printed MXene interdigitated electrode) sensing (coated MXene/silver nanowires) layers via a scalable screen‐printing approach. Benefiting from multi‐layered porous structure, demonstrates good air permeability high sensitivity (770.86–1434.89 kPa −1 ), wide range (0–100 kPa), fast response/recovery time (70/81 ms), detection limit (≈1 Pa). Particularly, this can detect full‐scale human motion small‐scale pulse beating large‐scale walking/running) sensitivity, excellent cycling stability, puncture resistance. Additionally, layer of also displays superior humidity changes, which verified by successfully monitoring breathing spoken words while sensor‐embedded mask. Given outstanding features, shows promise electronic field body health sports activity detection, disease diagnosis.

Язык: Английский

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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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Porous graphene foam composite-based dual-mode sensors for underwater temperature and subtle motion detection

Chemical Engineering Journal, Год журнала: 2022, Номер 444, С. 136631 - 136631

Опубликована: Апрель 28, 2022

Язык: Английский

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Moisture-resistant, stretchable NOx gas sensors based on laser-induced graphene for environmental monitoring and breath analysis

Microsystems & Nanoengineering, Год журнала: 2022, Номер 8(1)

Опубликована: Июль 8, 2022

The accurate, continuous analysis of healthcare-relevant gases such as nitrogen oxides (NOx) in a humid environment remains elusive for low-cost, stretchable gas sensing devices. This study presents the design and demonstration moisture-resistant, NOx sensor based on laser-induced graphene (LIG). Sandwiched between soft elastomeric substrate moisture-resistant semipermeable encapsulant, LIG electrode layer is first optimized by tuning laser processing parameters power, image density, defocus distance. sensor, using needlelike prepared with optimal parameters, exhibits large response 4.18‰ ppm−1 to NO 6.66‰ NO2, an ultralow detection limit 8.3 ppb 4.0 fast response/recovery, excellent selectivity. serpentine structure strain isolation from stiff island allows be stretched 30%. Combined property against relative humidity 90%, reported has further been demonstrated monitor personal local during different times day analyze human breath samples classify patients respiratory diseases healthy volunteers. Moisture-resistant, sensors can expand capability wearable devices detect biomarkers humans exposed environments early disease diagnostics.

Язык: Английский

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Laser-induced graphene (LIG)-based pressure sensor and triboelectric nanogenerator towards high-performance self-powered measurement-control combined system

Nano Energy, Год журнала: 2022, Номер 96, С. 107099 - 107099

Опубликована: Фев. 25, 2022

Язык: Английский

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Multifunctional wearable humidity and pressure sensors based on biocompatible graphene/bacterial cellulose bioaerogel for wireless monitoring and early warning of sleep apnea syndrome

Nano Energy, Год журнала: 2023, Номер 108, С. 108215 - 108215

Опубликована: Янв. 25, 2023

Язык: Английский

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High‐Performance, Highly Stretchable, Flexible Moist‐Electric Generators via Molecular Engineering of Hydrogels

Advanced Materials, Год журнала: 2023, Номер 35(20)

Опубликована: Фев. 22, 2023

Harvesting energy from ubiquitous moisture has emerged as a promising technology, offering opportunities to power wearable electronics. However, low current density and inadequate stretching limit their integration into self-powered wearables. Herein, high-performance, highly stretchable, flexible moist-electric generator (MEG) is developed via molecular engineering of hydrogels. The involves the impregnation lithium ions sulfonic acid groups polymer chains create ion-conductive stretchable This new strategy fully leverages structure chains, circumventing addition extra elastomers or conductors. A centimeter-sized hydrogel-based MEG can generate an open-circuit voltage 0.81 V short-circuit up 480 µA cm-2 . more than ten times that most reported MEGs. Moreover, improves mechanical properties hydrogels, resulting in stretchability 506%, representing state-of-the-art level Notably, large-scale high-performance MEGs demonstrated wearables with integrated electronics, including respiration monitoring masks, smart helmets, medical suits. work provides fresh insights design MEGs, facilitating application broadening scenario.

Язык: Английский

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Fully stretchable, porous MXene-graphene foam nanocomposites for energy harvesting and self-powered sensing

Nano Energy, Год журнала: 2022, Номер 103, С. 107807 - 107807

Опубликована: Сен. 15, 2022

Язык: Английский

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