High‐Performance Hydrogel Sensors Enabled Multimodal and Accurate Human–Machine Interaction System for Active Rehabilitation

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(11)

Published: Dec. 14, 2023

Human-machine interaction (HMI) technology shows an important application prospect in rehabilitation medicine, but it is greatly limited by the unsatisfactory recognition accuracy and wearing comfort. Here, this work develops a fully flexible, conformable, functionalized multimodal HMI interface consisting of hydrogel-based sensors self-designed flexible printed circuit board. Thanks to component regulation structural design hydrogel, both electromyogram (EMG) forcemyography (FMG) signals can be collected accurately stably, so that they are later decoded with assistance artificial intelligence (AI). Compared traditional multichannel EMG signals, human-machine method based on combination FMG significantly improves efficiency increasing information entropy signals. The decoding from only two channels for different gestures reaches 91.28%. resulting AI-powered active system control pneumatic robotic glove assist stroke patients completing movements according recognized human motion intention. Moreover, further generalized applied other remote sensing platforms, such as manipulators, intelligent cars, drones, paving way future robot systems.

Language: Английский

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A Breathable, Stretchable, and Self‐Calibrated Multimodal Electronic Skin Based on Hydrogel Microstructures for Wireless Wearables

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: April 12, 2024

Abstract Biomimetic electronic skins (e‐skins) are widely used in wearables, smart prosthesis and soft robotics. However, multimodal e‐skins, especially those based on hydrogels, face multiple challenges for practical applications, involving multi‐sensing signal mutual interference, low breathability stretchability. Here, a breathable stretchable e‐skin with multilayer film microstructure is developed to achieve self‐calibrated sensing of any two three stimuli: strain, temperature, humidity, minimal crosstalk. Hydrogel fibers different shapes designed strain temperature modules, the hydrogel as humidity module. The exhibits impressive performance, including detection limit (0.03%), linearity (R 2 = 0.990), high‐temperature sensitivity (1.77%/°C), wide range (33–98% RH). Interestingly, due directional anisotropy shaped fibers, realizes directions. By introducing porous elastomer encapsulation membranes, wearing comfort attained, while high stretchability (100% strain) maintained. Furthermore, personalized human‐machine interaction system created by integrating wireless circuit realize real‐time gesture recognition, physiological signals monitoring, prosthesis.

Language: Английский

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Skin‐Inspired Textile Electronics Enable Ultrasensitive Pressure Sensing

Small, Journal Year: 2024, Volume and Issue: 20(33)

Published: April 2, 2024

Wearable pressure sensors have attracted great interest due to their potential applications in healthcare monitoring and human-machine interaction. However, it is still a critical challenge simultaneously achieve high sensitivity, low detection limit, fast response, outstanding breathability for wearable electronics the difficulty constructing microstructure on porous substrate. Inspired by spinosum of human skin highly-sensitive tactile perception, biomimetic flexible sensor designed fabricated assembling MXene-based sensing electrode interdigitated electrode. The product exhibits good flexibility suitable air permeability (165.6 mm s

Language: Английский

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Two-Stage Micropyramids Enhanced Flexible Piezoresistive Sensor for Health Monitoring and Human–Computer Interaction

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(6), P. 7640 - 7649

Published: Feb. 2, 2024

High-performance flexible piezoresistive sensors are becoming increasingly essential in various novel applications such as health monitoring, soft robotics, and human–computer interaction. The evolution of the interfacial contact morphology determines sensing properties devices. introduction microstructures enriches effectively boosts sensitivity; however, limited compressibility conventional leads to rapid saturation sensitivity low-pressure range, which hinders their application. Herein, we present a sensor featuring two-stage micropyramid array structure, enhances while widening range. Owing synergistic enhancement effect resulting from sequential micropyramids heights, devices demonstrate remarkable performance, including boosting (30.8 kPa–1) over wide range (up 200 kPa), fast response/recovery time (75/50 ms), an ultralong durability 15,000 loading–unloading cycles. As proof concept, is applied detect human physiological motion signals, further demonstrating real-time spatial pressure distribution system game control system, showing great potential for monitoring

Language: Английский

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Lignin Powered Versatile Bioelastomer: A Universal Medium for Smart Photothermal Conversion

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 31, 2024

Abstract Photothermal elastomers are recognized as smart flexible materials that can rapidly and effectively convert light energy into heat energy. However, there has been a lack of adequate focus on tackling the sustainability challenges photothermal elastomers, particularly in terms material selection, integration complex functionalities, final disposal. A fully bio‐derived elastomer (BPTE) produced through simple chemical‐free approach is introduced, utilizing alkali lignin, lipoic acid, phytic acid feedstocks. The BPTE exhibits an adaptive polymeric network crosslinked by dynamic covalent disulfide bonds multiple hydrogen bonds, endowing it with dual‐mode conversion capability, robustness, stretchability, self‐healing property, hydrophobicity, swelling resistance, self‐adhesion, full recyclability, degradability. further demonstrated next‐generation solution for generators, light‐driven actuators, antibacterial dressings, fibers. versatility opens avenues innovative devices systems significant potential conversion, soft robotics, medical treatment, clothing. With outstanding performances, biodegradability, these bio‐based present attractive prospect development advanced products.

Language: Английский

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Multi‐Interface Engineering of MXenes for Self‐Powered Wearable Devices

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: May 23, 2024

Self-powered wearable devices with integrated energy supply module and sensitive sensors have significantly blossomed for continuous monitoring of human activity the surrounding environment in healthcare sectors. The emerging MXene-based materials has brought research upsurge fields electronics, owing to their excellent electrochemical performance, large surface area, superior mechanical tunable interfacial properties, where performance can be further boosted via multi-interface engineering. Herein, a comprehensive review recent progress MXenes self-powered is discussed from aspects fundamental properties including electronic, mechanical, optical, thermal characteristics are detail. Different previous works on MXenes, engineering termination regulation modification impact storage/conversion summarized. Based manipulation strategies, potential applications outlined. Finally, proposals perspectives provided current challenges future directions devices.

Language: Английский

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Permeable, Stretchable, and Recyclable Cellulose Aerogel On-Skin Electronics for Dual-Modal Sensing and Personal Healthcare

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

Flexible on-skin electronics present tremendous popularity in intelligent electronic skins (e-skins), healthcare monitoring, and human-machine interfaces. However, the reported e-skins can hardly provide high permeability, good stretchability, large sensitivity are limited long-term stability efficient recyclability when worn on human body. Herein, inspired from skin, a permeable, stretchable, recyclable cellulose aerogel-based system is developed by sandwiching screen-printed silver sensing layer between biocompatible CNF/HPC/PVA (cellulose nanofiber/hydroxypropyl cellulose/poly(vinyl alcohol)) aerogel hypodermis permeable polyurethane as epidermis layer. The displays tensile strength of 1.14 MPa strain 43.5% while maintaining permeability. embrace appealing performances with (gauge factor ≈ 238), ultralow detection limit (0.1%), fast response time (18 ms) under stimulus. Owing to disconnection reconnection microcracks layer, both strain/humidity thermal be easily achieved. further integrated into an mask for patient-centered power supply system, switching control device, wireless Bluetooth module. Moreover, prepared enables wearing skin without irritation, all components recaptured/reused water. This material strategy highlights potential next-generation permeability environmental friendliness.

Language: Английский

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Flexible Bioinspired Healable Antibacterial Electronics for Intelligent Human‐Machine Interaction Sensing

Advanced Science, Journal Year: 2023, Volume and Issue: 11(10)

Published: Dec. 22, 2023

Abstract Flexible electronic sensors are receiving numerous research interests for their potential in skins (e‐skins), wearable human‐machine interfacing, and smart diagnostic healthcare sensing. However, the preparation of multifunctional flexible electronics with high sensitivity, broad sensing range, fast response, efficient healability, reliable antibacterial capability is still a substantial challenge. Herein, bioinspired by highly sensitive human skin microstructure (protective epidermis/spinous structure/nerve conduction network), bionic prepared face‐to‐face assembly newly healable, recyclable, polyurethane elastomer matrix conductive MXene nanosheets‐coated microdome array after ingenious templating method as protective epidermis layer/sensing layer, an interdigitated electrode signal transmission layer. The functionalized triple dynamic bonds (reversible hydrogen bonds, oxime carbamate copper (II) ion coordination bonds) prepared, demonstrating excellent healability healing efficiency, robust recyclability, capability, well good biocompatibility. Benefiting from superior mechanical performance unique sensor, as‐assembled exhibit admirable performances featuring ultrahigh sensitivity (up to 1573.05 kPa −1 ), range 325 kPa), reproducibility, response time (≈4 ms), low detection limit (≈0.98 Pa) monitoring, performance.

Language: Английский

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A Flexible Skin Bionic Thermally Comfortable Wearable for Machine Learning‐Facilitated Ultrasensitive Sensing

Advanced Science, Journal Year: 2024, Volume and Issue: 11(32)

Published: June 25, 2024

Abstract Tremendous popularity is observed for multifunctional flexible electronics with appealing applications in intelligent electronic skins, human–machine interfaces, and healthcare sensing. However, the reported sensing electronics, mostly can hardly provide ultrasensitive sensitivity, wider range, robust cycling stability simultaneously, are limited of efficient heat conduction out from contacted skin interface after wearing on human to satisfy thermal comfort skin. Inspired tactile perception microstructure (epidermis/spinosum/signal transmission) skin, a comfortably wearable hereby prepared conductive boron nitride nanosheets‐incorporated polyurethane elastomer matrix MXene nanosheets‐coated surface microdomes as epidermis/spinosum layers assembled interdigitated electrode signal transmission layer. It demonstrates performance sensitivity (≈288.95 kPa −1 ), up 300 20 000 cycles obvious contact area variation between microdome microstructures under external compression. Furthermore, bioinspired present advanced management by timely dissipation meet incorporated nanosheets. Thus, it vitally promising artificial human‐interactive sensing, personal health management.

Language: Английский

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Skin-inspired interlocked microstructures with soft-hard synergistic effect for high-sensitivity and wide-linear-range pressure sensing

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154083 - 154083

Published: July 17, 2024

Language: Английский

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