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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Trehalose-enhanced ionic conductive hydrogels with extreme stretchability, self-adhesive and anti-freezing abilities for both flexible strain sensor and all-solid-state supercapacitor

Chemical Engineering Journal, Год журнала: 2023, Номер 472, С. 144849 - 144849

Опубликована: Июль 17, 2023

Язык: Английский

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Mechanical tough and stretchable quaternized cellulose nanofibrils/MXene conductive hydrogel for flexible strain sensor with multi-scale monitoring

Journal of Material Science and Technology, Год журнала: 2024, Номер 191, С. 181 - 191

Опубликована: Фев. 2, 2024

Язык: Английский

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Biological Tissue-Inspired Ultrasoft, Ultrathin, and Mechanically Enhanced Microfiber Composite Hydrogel for Flexible Bioelectronics

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

Опубликована: Май 28, 2023

Hydrogels offer tissue-like softness, stretchability, fracture toughness, ionic conductivity, and compatibility with biological tissues, which make them promising candidates for fabricating flexible bioelectronics. A soft hydrogel film offers an ideal interface to directly bridge thin-film electronics the tissues. However, it remains difficult fabricate a ultrathin configuration excellent mechanical strength. Here we report tissue-inspired ultrasoft microfiber composite (< 5 μm) film, is currently thinnest as far know. The embedded microfibers endow prominent strength (tensile stress ~ 6 MPa) anti-tearing property. Moreover, our capability of tunable properties in broad range, allowing matching modulus most tissues organs. incorporation glycerol salt ions imparts high conductivity anti-dehydration behavior. Such hydrogels are constructing attaching-type bioelectronics monitor biosignals.

Язык: Английский

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MXene-Mediated Cellulose Conductive Hydrogel with Ultrastretchability and Self-Healing Ability

ACS Nano, Год журнала: 2023, Номер 17(20), С. 20699 - 20710

Опубликована: Окт. 12, 2023

Constructing natural polymers such as cellulose, chitin, and chitosan into hydrogels with excellent stretchability self-healing properties can greatly expand their applications but remains very challenging. Generally, the polysaccharide-based have suffered from trade-off between stiffness of polysaccharide due to inherent nature. Thus, (polysaccharides act matrix) are scarcely reported. Here, a solvent-assisted strategy was developed construct MXene-mediated cellulose conductive (∼5300%) self-healability. MXene (an emerging two-dimensional nanomaterial) introduced noncovalent cross-linking sites solvated chains in benzyltrimethylammonium hydroxide aqueous solution. The electrostatic interaction terminal functional groups (O, OH, F) led by form hydrogel. Due cellulose-MXene hydrogel, work not only enabled strong potential both fields electronic skins energy storage provided fresh ideas for some other stubborn chitin prepare properties.

Язык: Английский

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A Semi‐Interpenetrating Poly(Ionic Liquid) Network‐Driven Low Hysteresis and Transparent Hydrogel as a Self‐Powered Multifunctional Sensor

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Май 6, 2024

Abstract Conductive hydrogels are gaining significant attention as promising candidates for the fabrication materials flexible electronics. Nevertheless, improving tensile properties, hysteresis, durability, adhesion, and electrochemical properties of these remains challenging. This work reports development a novel semi‐interpenetrating network poly(ionic liquid) hydrogel named PATV, via in situ polymerization acrylamide, N ‐[Tris(hydroxymethyl)methyl] 1‐vinyl‐3‐butylimidazolium tetrafluoroborate. The density functional theory calculations reveal that acts physical cross–linking points to construct hydrogen‐bond networks. Furthermore, networks dissipate energy efficiently quickly, thus stress concentration hysteresis avoided. prepared has low (9%), high (900%), fast response (180 ms), sensitivity (gauge factor = 10.4, pressure 0.14 kPa −1 ), wide sensing range (tensile range: 1–600%, compression 0.1–20 kPa). A multifunctional sensor designed based on enables real‐time, rapid, stable response‐ability detection human movement, facial expression recognition, pronunciation, pulse, handwriting, Morse code encryption. assembled triboelectric nanogenerator displays an excellent harvesting capability, highlighting its potential application self‐powered wearable electronic devices.

Язык: Английский

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Fully Polymeric Conductive Hydrogels with Low Hysteresis and High Toughness as Multi‐Responsive and Self‐Powered Wearable Sensors

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Апрель 22, 2024

Abstract High mechanical strength, excellent toughness, low hysteresis, and robust resilience are of great importance for stretchable conductive hydrogels (CHs) to heighten their reliabilities self‐powered sensing applications. However, it still remains challenging simultaneously obtain the mutually exclusive performances. Herein, an intrinsically adhesive hydrogel is fabricated by one‐step radical polymerization acrylamide (AAm), three hydroxy groups together clustered‐N‐[tris(hydroxymethyl)methyl]acrylamide (THMA), cationic 1‐Butyl‐3‐Vinylimidazolium Bromide (ILs) dissolved in core‐shell structurally dispersed PEDOT:PSS (PP) solution. Owing abundant clustered hydrogen bonds, electrostatic interactions between PILs chains anionic PSS shells, polymer chain entanglements, CHs feature superior properties with a high tensile strength (0.25 MPa), fracture strain (1015%), toughness (1.22 MJ m ‐3 ), energy 36.5 kJ ‐2 extremely hysteresis (5%), display fatigue resistance. As result, indicate gauge factor up 10.46, broad range (1‐900%) pressure (0.05‐100 kPa), fast responsive rate, thus qualifying monitoring reliably accurately large tiny human movements daily life. Moreover, hydrogel‐assembled triboelectric nanogenerators (TENGs) exhibit stable electrical output performances, which greatly promising flexible wearable electronics.

Язык: Английский

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High-Saline-Enabled Hydrophobic Homogeneous Cross-Linking for Extremely Soft, Tough, and Stretchable Conductive Hydrogels as High-Sensitive Strain Sensors

ACS Nano, Год журнала: 2023, Номер 17(22), С. 23194 - 23206

Опубликована: Ноя. 6, 2023

Design of admirable conductive hydrogels combining robust toughness, soft flexibility, desirable conductivity, and freezing resistance remains daunting challenges for meeting the customized critical demands flexible wearable electronics. Herein, a promising facile strategy to prepare tailored these anticipated is proposed, which prepared in one step by homogeneous cross-linking acrylamide using hydrophobic divinylbenzene stabilized micelles under saturated high-saline solutions. The influence environments on hydrogel topology mechanical performance investigated. suppress size cross-linkers during polymerization, weaken dynamic associations soften hydrogels. Nevertheless, cross-linked networks ensure antifracture ultralarge deformations. obtained show special extremely deformability features (Young's modulus, 5 kPa; stretchability, 10200%; 134 kJ m-2; excellent anticrack propagation). saturated-saline also endow with ion conductivity (106 mS cm-1) (<20 °C). These comprehensive properties are quite suitable electronic applications, demonstrated high sensitivity durability derived strain sensors.

Язык: Английский

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Electronic Skin for Health Monitoring Systems: Properties, Functions, and Applications

Advanced Materials, Год журнала: 2024, Номер 36(31)

Опубликована: Май 17, 2024

Abstract Electronic skin (e‐skin), a skin‐like wearable electronic device, holds great promise in the fields of telemedicine and personalized healthcare because its good flexibility, biocompatibility, conformability, sensing performance. E‐skin can monitor various health indicators human body real time over long term, including physical (exercise, respiration, blood pressure, etc.) chemical (saliva, sweat, urine, etc.). In recent years, development materials, analysis, manufacturing technologies has promoted significant e‐skin, laying foundation for application next‐generation medical devices. Herein, properties required e‐skin monitoring devices to achieve long‐term precise summarize several detectable field are discussed. Subsequently, applications integrated systems reviewed. Finally, current challenges future directions this This review is expected generate interest inspiration improvement systems.

Язык: Английский

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Ion gradient induced self-powered flexible strain sensor

Nano Energy, Год журнала: 2024, Номер 126, С. 109689 - 109689

Опубликована: Апрель 30, 2024

Язык: Английский

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