Emerging MXene‐Based Flexible Tactile Sensors for Health Monitoring and Haptic Perception

Small, Journal Year: 2023, Volume and Issue: 19(27)

Published: March 25, 2023

Abstract Due to their potential applications in physiological monitoring, diagnosis, human prosthetics, haptic perception, and human–machine interaction, flexible tactile sensors have attracted wide research interest recent years. Thanks the advances material engineering, high performance been obtained. Among representative pressure sensing materials, 2D layered nanomaterials many properties that are superior those of bulk more suitable for sensors. As a class inorganic compounds materials science, MXene has excellent electrical, mechanical, biological compatibility. MXene‐based composites proven be promising candidates due stretchability metallic conductivity. Therefore, great efforts devoted development sensor applications. In this paper, controllable preparation characterization introduced. Then, progresses on fabrication strategies, operating mechanisms, device composite‐based sensors, including piezoresistive capacitive piezoelectric triboelectric reviewed. After that, material‐based electronics motion healthcare, artificial intelligence discussed. Finally, challenges perspectives summarized.

Language: Английский

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

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(43), P. 48907 - 48916

Published: Oct. 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.

Language: 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, Journal Year: 2024, Volume and Issue: 16(2), P. 2554 - 2563

Published: Jan. 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.

Language: Английский

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Flexible Pressure Sensor with an Excellent Linear Response in a Broad Detection Range for Human Motion Monitoring

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(2), P. 3476 - 3485

Published: Jan. 9, 2023

Pressure sensing is highly demanding in wearable devices, robotics, and artificial intelligence, whereas it still a big challenge to develop pressure sensor with an excellent linear response broad detection range. Herein, flexible porous carbon nanotube (CNT)/carbon black (CB)/carbonyl iron powder (CIP)/silicone composite proposed by simple strategy of mixing, curing, washing. Due the structure induced sacrifice sugar particles, (R2 = 0.999) achieved for manipulating contributions contact resistance tunnel performance via alternation CB CNT contents. Moreover, donates low compressive modulus at level, while CIPs introduced lead high level assistance external magnetic field. As result, produced has wide range 80 Pa 220 kPa, much wider than most sensors reported previously. The demonstrated cyclic tests frequency 0.1-5 Hz, durability tests, monitoring human or robot motions including breathing, walking, lifting, boxing, etc. Taking advantages cost, sensitivity, range, current promising precise delicate controlling robots.

Language: Английский

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Facile fabrication of superhydrophobic and photocatalytic self-cleaning flexible strain sensor membrane for human motion

Sensors and Actuators A Physical, Journal Year: 2023, Volume and Issue: 363, P. 114750 - 114750

Published: Oct. 17, 2023

Language: Английский

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MXene sensors based on optical and electrical sensing signals: from biological, chemical, and physical sensing to emerging intelligent and bionic devices

PhotoniX, Journal Year: 2023, Volume and Issue: 4(1)

Published: May 5, 2023

Abstract Sensing devices are key nodes for information detection, processing, and conversion widely applied in different fields such as industrial production, environmental monitoring, defense. However, increasing demand of these has complicated the application scenarios diversified detection targets thereby promoting continuous development sensing materials methods. In recent years, Ti n+1 C n T x ( = 1, 2, 3) MXenes with outstanding optical, electrical, thermal, mechanical properties have been developed ideal candidates to apply physical, chemical, biological fields. this review, depending on optical electrical signals, we systematically summarize nine categories sensors strain, gas, fluorescence sensors. The excellent allow its further emerging intelligent bionic devices, including smart flexible E-skin, neural network coding learning, soft robot, well artificial eardrum, which all discussed briefly review. Finally, present a positive outlook potential future challenges perspectives MXene-based shown vigorous momentum applications can drive an number new technologies.

Language: Английский

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Flexible Pressure Sensors in Human–Machine Interface Applications

Small, Journal Year: 2023, Volume and Issue: 20(15)

Published: Nov. 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.

Language: Английский

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Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

ACS Nano, Journal Year: 2024, Volume and Issue: 18(18), P. 11525 - 11559

Published: April 24, 2024

The design and preparation of flexible aerogel materials with high deformability versatility have become an emerging research topic in the fields, as brittle nature traditional aerogels severely affects their safety reliability use. Herein, we review methods properties summarize various controlling to overcome fragility caused by porosity nanoporous network structure. mechanical flexibility can be revolutionarily improved monomer regulation, nanofiber assembly, structural controlling, constructing composites, which greatly broaden multifunctionality practical application prospects. construction criterion is summarized: a deformable microstructure matrix. Besides, derived multifunctional applications fields thermal insulation (flexible protection at extreme temperatures), wearable electronics sensors, electrodes, electromagnetic shielding, wave absorption), environmental (oil/water separation air filtration) are summarized. Furthermore, future development prospects challenges also This will provide comprehensive basis guidance for design, fabrication methods, potential aerogels.

Language: Английский

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Highly-sensitive, broad-range, and highly-dynamic MXene pressure sensors with multi-level nano-microstructures for healthcare and soft robots applications

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149750 - 149750

Published: Feb. 16, 2024

Language: Английский

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3D Printing of Anisotropic Piezoresistive Pressure Sensors for Directional Force Perception

Advanced Science, Journal Year: 2024, Volume and Issue: 11(24)

Published: March 13, 2024

Abstract Anisotropic pressure sensors are gaining increasing attention for next‐generation wearable electronics and intelligent infrastructure owing to their sensitivity in identifying different directional forces. 3D printing technologies have unparalleled advantages the design of anisotropic with customized structures realizing tunable anisotropy. has demonstrated few successes utilizing piezoelectric nanocomposites recognition. However, 3D‐printed piezoresistive (PPSs) remain unexplored despite convenience saving poling process. This study pioneers development an aqueous printable ink containing waterborne polyurethane elastomer. An PPS featuring tailorable flexibility macroscopic microscopic pore morphologies is created by adopting direct writing technology. Consequently, desired force perception achieved programming schemes. Notably, printed excellent deformability, a relative 1.22 (kPa * wt. %)−1 over substantial range (2.8 8.1 kPa), approximately fivefold than that state‐of‐the‐art carbon‐based PPS. underscores versatility customizing highly sensitive advanced sensing applications difficult achieve using conventional measures.

Language: Английский

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