Deep-Learning Enabled Active Biomimetic Multifunctional Hydrogel Electronic Skin

ACS Nano, Год журнала: 2023, Номер 17(16), С. 16160 - 16173

Опубликована: Июль 31, 2023

There is huge demand for recreating human skin with the functions of epidermis and dermis interactions physical world. Herein, a biomimetic, ultrasensitive, multifunctional hydrogel-based electronic (BHES) was proposed. Its function mimicked using poly(ethylene terephthalate) nanoscale wrinkles, enabling accurate identification materials through capabilities to gain/lose electrons during contact electrification. Internal mechanoreceptor by interdigital silver electrodes stick–slip sensing identify textures/roughness. The patterned microcone hydrogel, achieving pressure sensors high sensitivity (17.32 mV/Pa), large range (20–5000 Pa), low detection limit, fast response (10 ms)/recovery time (17 ms). Assisted deep learning, this BHES achieved accuracy minimized interference in identifying (95.00% 10 materials) textures (97.20% four roughness cases). By integrating signal acquisition/processing circuits, wearable drone control system demonstrated three-degree-of-freedom movement enormous potentials soft robots, self-powered human–machine interaction interfaces digital twins.

Язык: Английский

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Functionalized Hydrogel-Based Wearable Gas and Humidity Sensors

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Май 24, 2023

Abstract Breathing is an inherent human activity; however, the composition of air we inhale and gas exhale remains unknown to us. To address this, wearable vapor sensors can help people monitor in real time avoid underlying risks, for early detection treatment diseases home healthcare. Hydrogels with three-dimensional polymer networks large amounts water molecules are naturally flexible stretchable. Functionalized hydrogels intrinsically conductive, self-healing, self-adhesive, biocompatible, room-temperature sensitive. Compared traditional rigid sensors, hydrogel-based humidity directly fit skin or clothing, more suitable real-time monitoring personal health safety. In this review, current studies on investigated. The required properties optimization methods introduced. Subsequently, existing reports response mechanisms summarized. Related works their application safety presented. Moreover, potential field sensing elucidated. Finally, research status, challenges, future trends hydrogel gas/humidity discussed.

Язык: Английский

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

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Дек. 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.

Язык: Английский

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Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 23, 2024

Abstract With the commercialization of first‐generation flexible mobiles and displays in late 2010s, humanity has stepped into age electronics. Inevitably, soft multifunctional sensors, as essential components next‐generation electronics, have attracted tremendous research interest like never before. This review is dedicated to offering an overview latest emerging trends sensors their accordant future development (R&D) directions for coming decade. First, key characteristics predominant target stimuli are highlighted. Second, important selection criteria introduced. Next, materials/structures identified. Specifically, R&D these envisaged based on trends, namely i) decoupling multiple stimuli, ii) data processing, iii) skin conformability, iv) energy sources. Finally, challenges potential opportunities discussed, new insights prospects fast‐emerging technology.

Язык: Английский

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Tough, Antifreezing, and Piezoelectric Organohydrogel as a Flexible Wearable Sensor for Human–Machine Interaction

ACS Nano, Год журнала: 2024, Номер 18(4), С. 3720 - 3732

Опубликована: Янв. 18, 2024

Piezoelectric hydrogel sensors are becoming increasingly popular for wearable sensing applications due to their high sensitivity, self-powered performance, and simple preparation process. However, conventional piezoelectric hydrogels lack antifreezing properties thus confronted with the liability of rupture in low temperatures owing use water as dispersion medium. Herein, a kind organohydrogel that integrates piezoelectricity, low-temperature tolerance, mechanical robustness, stable electrical performance is reported by using poly(vinylidene fluoride) (PVDF), acrylonitrile (AN), acrylamide (AAm),

Язык: Английский

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An overview of conductive composite hydrogels for flexible electronic devices

Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 7(2)

Опубликована: Фев. 17, 2024

Язык: Английский

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Mechanically Robust, Flexible, Fast Responding Temperature Sensor and High‐Resolution Array with Ionically Conductive Double Cross‐Linked Hydrogel

Advanced Functional Materials, Год журнала: 2024, Номер 34(21)

Опубликована: Янв. 28, 2024

Abstract Hydrogel‐based sensing devices show potential in wearable electronics. However, most hydrogels are mechanically weak, bringing functional stability problems real usage environment that may interact with occasionally external forces. There demands to develop robust hydrogel‐based good performances. Here, a highly sensitive temperature sensor robust, ionic conductive, and double cross‐linked polyacrylamide‐sodium alginate hydrogel is developed. It found ions larger radius higher sensitivity changes (e.g., Ba 2+ ) the hydrogel, because ion movement dependent sizes. The shows advantages of fast response (2.02 s 40 °C difference), wide range (22–100 °C), high robustness (withstanding 2000 cyclic compression 175 N m −1 for 180° anti‐peeling test). can effectively distinguish temperatures various body parts (0.9 difference) monitor respiration (0.5 real‐time. A 5×5 array developed direct human‐body mapping, achieving an optimum resolution ≈0.15 mm enabling clear mapping superficial vascular pathways at wrist. This study provides practical optimized approach implementation conductive field human health.

Язык: Английский

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Ultrasensitive Flexible Thermal Sensor Arrays based on High‐Thermopower Ionic Thermoelectric Hydrogel

Advanced Science, Год журнала: 2023, Номер 10(25)

Опубликована: Июль 3, 2023

Abstract Ionic circuits using ions as charge carriers have demonstrated great potential for flexible and bioinspired electronics. The emerging ionic thermoelectric (iTE) materials can generate a difference by virtue of selective thermal diffusion ions, which provide new route sensing with the merits high flexibility, low cost, thermopower. Here, ultrasensitive sensor arrays based on an iTE hydrogel consisting polyquaternium‐10 (PQ‐10), cellulose derivative, polymer matrix sodium hydroxide (NaOH) ion source are reported. developed PQ‐10/NaOH achieves thermopower 24.17 mV K −1 , is among highest values reported biopolymer‐based materials. p ‐type be attributed to thermodiffusion Na + under temperature gradient, while movement OH − impeded strong electrostatic interaction positively charged quaternary amine groups PQ‐10. Flexible through patterning printed circuit boards, perceive spatial signals sensitivity. A smart glove integrated multiple further demonstrated, endows prosthetic hand sensation human–machine interaction.

Язык: Английский

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In Situ Structural Densification of Hydrogel Network and Its Interface with Electrodes for High-Performance Multimodal Artificial Skin

ACS Nano, Год журнала: 2024, Номер 18(24), С. 15754 - 15768

Опубликована: Июнь 3, 2024

The multisensory responsiveness of hydrogels positions them as promising candidates for artificial skin, whereas the mismatch modulus between soft and hard electrodes well poor adhesion conductance at interface greatly impairs stability electronics devices. Herein, we propose an in situ postprocessing approach utilizing electrochemical reactions metals (Zn, etc.) to synergistically achieve strong hydrogel-electrode interface, low interfacial impedance, local strain isolation due structural densification hydrogel network. mechanism is that Zn electrochemically oxidizes

Язык: Английский

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Nanoparticles incorporated hydrogels for delivery of antimicrobial agents: developments and trends

RSC Advances, Год журнала: 2024, Номер 14(19), С. 13535 - 13564

Опубликована: Янв. 1, 2024

Nanoparticle-hydrogel systems are versatile biomaterials that possess numerous advantages for biomedical applications. This review focuses on the application of nanoparticle-hydrogels system delivery antimicrobial agents.

Язык: Английский

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