Materials with Tunable Optical Properties for Wearable Epidermal Sensing in Health Monitoring

Advanced Materials, Год журнала: 2022, Номер 34(26)

Опубликована: Март 8, 2022

Advances in wearable epidermal sensors have revolutionized the way that physiological signals are captured and measured for health monitoring. One major challenge is to convert easily readable a convenient way. possibility based on visible readouts. There range of materials whose optical properties can be tuned by parameters such as temperature, pH, light, electric fields. Herein, this review covers highlights set with tunable their integration into Specifically, recent progress, fabrication, applications these summarized discussed. Finally, challenges perspectives next generation devices proposed.

Язык: Английский

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Fingerpad‐Inspired Multimodal Electronic Skin for Material Discrimination and Texture Recognition

Advanced Science, Год журнала: 2021, Номер 8(9)

Опубликована: Фев. 8, 2021

Human skin plays a critical role in person communicating with his or her environment through diverse activities such as touching deforming an object. Various electronic (E-skin) devices have been developed that show functional geometrical superiority to human skin. However, research into stretchable E-skin can simultaneously distinguish materials and textures has not established yet. Here, the first approach achieving multimodal device is reported, operates on basis of various electrical properties piezoelectricity, triboelectricity, piezoresistivity exceeds capabilities tactile perception. The prepared composed wrinkle-patterned silicon elastomer, hybrid nanomaterials silver nanowires zinc oxide nanowires, thin elastomeric dielectric layer covering nanomaterials, where exhibits high surface roughness mimicking fingerprints. This versatile identify only mechanical stress from single stimulus pressure, tensile strain, vibration but also combination multiple stimuli. With simultaneous sensing analysis integrated stimuli, enables material discrimination texture recognition for biomimetic prosthesis when multifunctional applied robotic hand.

Язык: Английский

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Recent Progress in Advanced Tactile Sensing Technologies for Soft Grippers

Advanced Functional Materials, Год журнала: 2023, Номер 33(41)

Опубликована: Авг. 27, 2023

Abstract Tactile sensing technology is crucial for soft grippers. Soft grippers equipped with intelligent tactile systems based on various sensors can interact safely the unstructured environments and obtain precise properties of objects (e.g., size shape). It essential to develop state‐of‐the‐art technologies handle different grasping tasks. In this review, development techniques robotic hands first introduced. Then, principles structures types normally adopted in grippers, including capacitive sensors, piezoresistive piezoelectric fiber Bragg grating (FBG) vision‐based triboelectric other advanced developed recently are briefly presented. Furthermore, modalities methodologies also described aspects force measurement, perception object properties, slip detection, fusion perception. The application scenarios summarized these technologies. Finally, challenges that need be tackled discussed perspectives addressing pointed out.

Язык: Английский

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A flexible, stretchable system for simultaneous acoustic energy transfer and communication

Science Advances, Год журнала: 2021, Номер 7(40)

Опубликована: Сен. 29, 2021

A flexible device is capable of simultaneous acoustic energy transfer and communication, for implantable medical application.

Язык: Английский

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Recent Advances of Energy Solutions for Implantable Bioelectronics

Advanced Healthcare Materials, Год журнала: 2021, Номер 10(17)

Опубликована: Апрель 30, 2021

The emerging field of implantable bioelectronics has attracted widespread attention in modern society because it can improve treatment outcomes, reduce healthcare costs, and lead to an improvement the quality life. However, their continuous operation is often limited by conventional bulky rigid batteries with a lifespan, which must be surgically removed after completing missions and/or replaced being exhausted. Herein, this paper gives comprehensive review recent advances nonconventional energy solutions for bioelectronics, emphasizing miniaturized, flexible, biocompatible, biodegradable power devices. According source energy, promising alternative are sorted into three main categories, including storage devices (batteries supercapacitors), internal energy-harvesting (including biofuel cells, piezoelectric/triboelectric harvesters, thermoelectric biopotential generators), external wireless transmission technologies inductive coupling/radiofrequency, ultrasound-induced, photovoltaic devices). Their fundamentals, materials strategies, structural design, output performances, animal experiments, typical biomedical applications also discussed. It expected offer complementary sources extend battery lifetime while acting as independent supply. Thereafter, existing challenges perspectives associated these powering outlined, focus on bioelectronics.

Язык: Английский

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A Waterproof Ion‐Conducting Fluorinated Elastomer with 6000% Stretchability, Superior Ionic Conductivity, and Harsh Environment Tolerance

Advanced Functional Materials, Год журнала: 2022, Номер 32(22)

Опубликована: Фев. 24, 2022

Abstract The development of ionic conductors with extreme stretchability, superior conductivity, and harsh‐environment resistance is urgent while challenging because the tailoring these performances mutually exclusive. Herein, a hydrophobicity‐constrained association strategy presented for fabricating liquid‐free ion‐conducting fluorinated elastomer (ICFE) microphase‐separated structures. Hydrophilic nanodomains long‐range ordering selectively enriched Li ions provided high‐efficient conductive pathways, yielding impressive room‐temperature conductivity 3.5 × 10 –3 S m –1 . Hydrophobic abundant reversible hydrogen bonds endow ICFE damage‐tolerant including ultrastretchability (>6000%), large toughness (17.1 MJ ) notch insensitivity, antifatigue ability, high‐efficiency self‐healability. Due to its characteristic surface‐enriched hydrophobic nanodomains, demonstrates an temperature tolerance (−20 300 °C) unique underwater resistance. resultant assembled into proof‐of‐concept skin‐inspired sensor, showing capacitive sensing performance high sensitivity wide‐strain‐range linearity (gauge factor 1.0 in strain range 0–350%), excellent durability (>1000 cycles), waterproofness monitoring complex human motions. It believed that method boosts fabrication stretchable holding great promise ionotronics tolerance.

Язык: Английский

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Standalone stretchable RF systems based on asymmetric 3D microstrip antennas with on-body wireless communication and energy harvesting

Nano Energy, Год журнала: 2022, Номер 96, С. 107069 - 107069

Опубликована: Фев. 17, 2022

Язык: Английский

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Highly integrated watch for noninvasive continual glucose monitoring

Microsystems & Nanoengineering, Год журнала: 2022, Номер 8(1)

Опубликована: Фев. 23, 2022

This article reports a highly integrated watch for noninvasive continual blood glucose monitoring. The employs Nafion-coated flexible electrochemical sensor patch fixed on the watchband to obtain interstitial fluid (ISF) transdermally at wrist. reverse iontophoresis-based extraction method eliminates pain and inconvenience that traditional fingerstick tests pose in diabetic patients' lives, making monitoring practical easy. All electronic modules, including rechargeable power source other modules signal processing wireless transmission, are onto face-sized printed circuit board (PCB), enabling comfortable wearing of this monitor. Real-time levels displayed LED screen can also be checked with smartphone user interface. With 23 volunteers, demonstrated 84.34% clinical accuracy Clarke error grid analysis (zones A + B). In near future, commercial products could developed based lab-made prototype provide public

Язык: Английский

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The Roadmap of 2D Materials and Devices Toward Chips

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Фев. 16, 2024

Due to the constraints imposed by physical effects and performance degradation, silicon-based chip technology is facing certain limitations in sustaining advancement of Moore's law. Two-dimensional (2D) materials have emerged as highly promising candidates for post-Moore era, offering significant potential domains such integrated circuits next-generation computing. Here, this review, progress 2D semiconductors process engineering various electronic applications are summarized. A careful introduction material synthesis, transistor focused on device configuration, dielectric engineering, contact integration given first. Then transistors including digital analog circuits, heterogeneous chips, sensing discussed. Moreover, several (artificial intelligence chips quantum chips) based specific mechanism devices introduced. Finally, challenges encountered achieving circuit-level or system-level analyzed, development pathways roadmaps further speculated outlooked.

Язык: Английский

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Implantable Flexible Sensors for Health Monitoring

Advanced Healthcare Materials, Год журнала: 2023, Номер 13(2)

Опубликована: Окт. 11, 2023

Flexible sensors, as a significant component of flexible electronics, have attracted great interest the realms human-computer interaction and health monitoring due to their high conformability, adjustable sensitivity, excellent durability. In comparison wearable sensor-based in vitro monitoring, use implantable sensors (IFSs) for vivo offers more accurate reliable vital sign information ability adapt directly integrate with human tissue. IFSs show tremendous promise field unique advantages such robust signal reading capabilities, lightweight design, flexibility, biocompatibility. Herein, review signs is detailly provided, highlighting essential conditions applications. As prerequisites IFSs, stretchability wireless self-powered properties sensor are discussed, special attention paid sensing materials which can maintain prominent biosafety (i.e., biocompatibility, biodegradability, bioresorbability). Furthermore, applications various parts body described detail, summary brain eye blood monitoring. Finally, challenges well opportunities development next-generation presented.

Язык: Английский

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