Skin‐Inspired and Self‐Powered Piezoionic Sensors for Smart Wearable Applications

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Abstract Bio‐inspired by tactile function of human skin, piezoionic skin sensors recognize strain and stress through converting mechanical stimulus into electrical signals based on ion transfer. However, transfer inside is significantly restricted the lack hierarchical structure electrode materials, then impedes practical application. Here, a durable nanocomposite developed carbon nanotubes graphene, integrated for smart wearable applications, such as facial expression exercise posture recognitions. The provides abundant channels because its hierarchically porous structure. Carbon not only prevent restacking graphene nanolayers, but also connect them across out‐plane dimension. present high degree linearity in wide range with sensitivity, long cycling life bending strains beyond 20 000 s. Further, bracelet flexible fabricated accurate recognition badminton exercise, valuable to athlete training.

Язык: Английский

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Highly efficient ionic actuators enabled by sliding ring molecule actuation

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 12, 2025

Ionic actuators with capability of electro-mechanical transduction are emerging as a useful platform for artificial intelligence and modern medical instruments. However, the insufficient ion transport inside material interfaces usually leads to limited energy efficiency density actuators. Here, we report polyrotaxane interface adjustable based on sliding-ring effect highly-efficient ionic The switch status channels is synchronous actuation strains, barrier interfacial transfer reduced. As result, gets significantly improved. as-delivered devices stronger than that mammalian skeletal muscle. Based high performances, demonstrate fiber-shape soft actuator can be directly injected into biological tissue just using syringe. injectable promising surgical navigation physiological monitoring. Traditional capacitive mechanism suffers from low efficiency. authors sliding ring large density.

Язык: Английский

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Piezoionic Skin Sensors for Wearable Applications

Accounts of Materials Research, Год журнала: 2024, Номер unknown

Опубликована: Дек. 9, 2024

ConspectusPiezoionic skin sensors are one kind of artificial electrical that can output sensing signals in response to external strain or stress stimulus with merits flexibility, lightness, scalability, and high sensitivity. They have been emerging as an important platform intelligence, such smart healthcare, bionic robotics, microelectromechanical systems. Piezoionic typically composed electrolyte laminated symmetric electrodes based on ion migration redistribution under a gradient field. However, existing challenges significantly impede the performance piezoionic sensors, including low electromechanical coupling efficiency electrode materials, instability strain-induced interface separation sensor interfaces. In recent years, our group collaborators made attempts addressing as-mentioned critical order achieve flexible satisfying for wearable applications. First, we developed various materials highly efficient storage transfer, graphdiyne, quinone composites, graphitic carbon nitride. These present superior mechanical properties enhanced efficiency. Second, improve stability electrolytes, especially air environment, ionogel electrolytes instead conventional hydrogel electrolytes. Ionogels contain stable ionic liquids, which effectively devices preserved even after several months. Third, regard separation, engineered material interfaces elaborate structures. The as-designed tree-root-inspired show conditions, display negligible deterioration thousands bending cycles ambient environment. Finally, obtained studied their practical applications, electronics, health monitoring, detections. For example, realized accurate detection blood pressure out-of-plane mechanism. This innovative technique completely avoids cuff issue commercial sphygmomanometers have. Moreover, multifinger-touch arrays effective braille recognition, potential eliminate communication barriers sight-impaired people. Human voices be easily differentiated by detecting vocal-cord vibrations captured obviously different patterns. is promising extended applied use virtual reality technology. Lastly, perspective highlighted set clear direction future research, low-cost synthesis, mass production healthcare products.

Язык: Английский

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Pseudohelicene chemosensor displaying ternary signaling stimulated by hydrostatic pressure and solvent

Chemical Communications, Год журнала: 2024, Номер unknown

Опубликована: Дек. 2, 2024

A flexible and dynamic pseudohelicene [2]HA2 functions as a ternary signaling chemosensor, driven by hydrostatic pressure solvation stimulations; + in toluene, 0 chloroform, − dichloromethane, respectively.

Язык: Английский

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