Cellulose‐Based Flexible Functional Materials for Emerging Intelligent Electronics

Advanced Materials, Journal Year: 2020, Volume and Issue: 33(28)

Published: April 20, 2020

Abstract There is currently enormous and growing demand for flexible electronics personalized mobile equipment, human–machine interface units, wearable medical‐healthcare systems, bionic intelligent robots. Cellulose a well‐known natural biopolymer that has multiple advantages including low cost, renewability, easy processability, biodegradability, as well appealing mechanical performance, dielectricity, piezoelectricity, convertibility. Because of its merits, cellulose frequently used substrate, binder, dielectric layer, gel electrolyte, derived carbon material electronic devices. Leveraging the to design advanced functional materials will have significant impact on portable electronics. Herein, unique molecular structure nanostructures (nanocrystals, nanofibers, nanosheets, etc.) are briefly introduced, structure–property–application relationships cellulosic summarized, processing technologies fabricating cellulose‐based considered. The focus then turns recent advances toward emerging devices sensors, optoelectronic devices, field‐effect transistors, nanogenerators, electrochemical energy storage biomimetic skins, biological detection Finally, an outlook potential challenges future prospects developing bioelectronic systems presented.

Language: Английский

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Wearable Pressure Sensors for Pulse Wave Monitoring

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: Jan. 19, 2022

Abstract Cardiovascular diseases remain the leading cause of death worldwide. The rapid development flexible sensing technologies and wearable pressure sensors have attracted keen research interest been widely used for long‐term real‐time cardiovascular status monitoring. Owing to compelling characteristics, including light weight, wearing comfort, high sensitivity pulse pressures, physiological waveforms can be precisely continuously monitored by health Herein, an overview human wave monitoring is presented, with a focus on transduction mechanism, microengineering structures, related applications in condition assessment. conceptualizations methods acquisition pathological information system are outlined. biomechanics arterial waves working mechanism various sensors, triboelectric, piezoelectric, magnetoelastic, piezoresistive, capacitive, optical also subject systematic debate. Exemple measurement based structured devices then summarized. Finally, discussion opportunities challenges that face, as well their potential intelligent personalized healthcare given conclusion.

Language: Английский

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Electronic Textiles for Wearable Point-of-Care Systems

Chemical Reviews, Journal Year: 2021, Volume and Issue: 122(3), P. 3259 - 3291

Published: Dec. 23, 2021

Traditional public health systems are suffering from limited, delayed, and inefficient medical services, especially when confronted with the pandemic aging population. Fusing traditional textiles diagnostic, therapeutic, protective devices can unlock electronic (e-textiles) as point-of-care platform technologies on human body, continuously monitoring vital signs implementing round-the-clock treatment protocols in close proximity to patient. This review comprehensively summarizes research advances e-textiles for wearable systems. We start a brief introduction emphasize significance of current healthcare system. Then, we describe textile sensors diagnosis, therapeutic treatment, prevention, by highlighting their working mechanisms, representative materials, clinical application scenarios. Afterward, detail e-textiles' connection gateway real-time data transmission processing context 5G Internet Things. Finally, provide new insights into remaining challenges future directions field e-textiles. Fueled chemistry materials science, textile-based diagnostic devices, communication units expected interact synergistically construct intelligent, platforms, ultimately illuminating system Things era.

Language: Английский

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Stretchable Electronics Based on PDMS Substrates

Advanced Materials, Journal Year: 2020, Volume and Issue: 33(6)

Published: Aug. 23, 2020

Abstract Stretchable electronics, which can retain their functions under stretching, have attracted great interest in recent decades. Elastic substrates, bear the applied strain and regulate distribution circuits, are indispensable components stretchable electronics. Moreover, self‐healing property of substrate is a premise to endow electronics with same characteristics, so device may recover from failure resulting large frequent deformations. Therefore, properties elastic crucial overall performance devices. Poly(dimethylsiloxane) (PDMS) widely used as material for not only because its advantages, include stable chemical properties, good thermal stability, transparency, biological compatibility, but also capability attaining designer functionalities via surface modification bulk tailoring. Herein, strategies fabricating on PDMS substrates summarized, influence physical PDMS, including status, modulus, geometric structures, discussed. Finally, challenges future opportunities based considered.

Language: Английский

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Progress in wearable electronics/photonics—Moving toward the era of artificial intelligence and internet of things

InfoMat, Journal Year: 2020, Volume and Issue: 2(6), P. 1131 - 1162

Published: July 12, 2020

Abstract The past few years have witnessed the significant impacts of wearable electronics/photonics on various aspects our daily life, for example, healthcare monitoring and treatment, ambient monitoring, soft robotics, prosthetics, flexible display, communication, human‐machine interactions, so on. According to development in recent years, next‐generation electronics photonics are advancing rapidly toward era artificial intelligence (AI) internet things (IoT), achieve a higher level comfort, convenience, connection, intelligence. Herein, this review provides an opportune overview progress electronics, photonics, systems, terms emerging materials, transducing mechanisms, structural configurations, applications, their further integration with other technologies. First, general is summarized applications physical sensing, chemical interaction, Then self‐sustainable systems discussed based system energy harvesting storage Next, technology fusion AI reviewed, showing emergence rapid intelligent/smart systems. In last section review, perspectives about future trends provided, that is, multifunctional, self‐sustainable, intelligent AI/IoT era. image

Language: Английский

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Recent Progress in Flexible Tactile Sensors for Human‐Interactive Systems: From Sensors to Advanced Applications

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(47)

Published: April 22, 2021

Abstract Flexible tactile sensors capable of measuring mechanical stimuli via physical contact have attracted significant attention in the field human‐interactive systems. The utilization information can complement vision and/or sound interaction and provide new functionalities. Recent advancements micro/nanotechnology, material science, technology resulted development high‐performance that reach even surpass sensing ability human skin. Here, important advances flexible over recent years are summarized, from sensor designs to system‐level applications. This review focuses on representative strategies based design configurations for improving key performance parameters including sensitivity, detection range/linearity, response time/hysteresis, spatial resolution/crosstalk, multidirectional force detection, insensitivity other stimuli. System‐level integration practical applications beyond conceptual prototypes promising applications, such as artificial electronic skin robotics prosthetics, wearable controllers electronics, bidirectional communication tools, also discussed. Finally, perspectives issues regarding further provided.

Language: Английский

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Microengineering Pressure Sensor Active Layers for Improved Performance

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(39)

Published: Aug. 9, 2020

Abstract Pressure sensors play an integral role in a wide range of applications, such as soft robotics and health monitoring. In order to meet this demand, many groups microengineer the active layer—the layer that deforms under pressure dictates changes output signal—of capacitive, resistive/piezoresistive, piezoelectric, triboelectric improve sensor performance. Geometric microengineering has been shown performance parameters sensitivity, dynamic range, limit detection, response relaxation times. There are implemented designs, including microdomes, micropyramids, lines or microridges, papillae, microspheres, micropores, microcylinders, each offering different advantages for particular application. It is important compare techniques by which microengineered layers designed fabricated they may provide additional insights on compatibility sensing limits. To evaluate fabrication method, it critical take into account uniformity, ease fabrication, shape size versatility tunability, scalability both device process. By better understanding how design compares, can be targetedly implemented.

Language: Английский

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Mussel‐Inspired Hydrogels for Self‐Adhesive Bioelectronics

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(25)

Published: April 20, 2020

Abstract Wearable and implantable bioelectronics are receiving a great deal of attention because they offer huge promise in personalized healthcare. Currently available generally rely on external aids to form an attachment the human body, which leads unstable performance practical applications. Self‐adhesive highly desirable for ameliorating these concerns by offering reliable conformal contact with tissue, stability fidelity signal detection. However, achieving adequate long‐term self‐adhesion soft wet biological tissues has been daunting challenge. Recently, mussel‐inspired hydrogels have emerged as promising candidates design self‐adhesive bioelectronics. In addition self‐adhesiveness, chemistry offers unique pathway integrating multiple functional properties all‐in‐one bioelectronic devices, implications healthcare this report, recent progress area is highlighted specifically discussing: 1) adhesion mechanism mussels, 2) repeatable adhesion, 3) advance development hydrogel reconciling self‐adhesiveness additional including conductivity, toughness, transparency, self‐healing, antibacterial properties, tolerance extreme environment, 4) challenges prospects future

Language: Английский

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Flexible Electronics and Devices as Human–Machine Interfaces for Medical Robotics

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(16)

Published: Dec. 12, 2021

Abstract Medical robots are invaluable players in non‐pharmaceutical treatment of disabilities. Particularly, using prosthetic and rehabilitation devices with human–machine interfaces can greatly improve the quality life for impaired patients. In recent years, flexible electronic soft robotics have attracted tremendous attention this field due to their high biocompatibility, functionality, conformability, low‐cost. Flexible on will make a promising alternative conventional rigid devices, which potentially revolutionize paradigm future direction medical terms feedback user experience. review, fundamental components materials, structures, mechanisms human‐machine summarized by renowned applications five primary areas: physical chemical sensing, physiological recording, information processing communication, robotic actuation, stimulation. This review further concludes discussing outlook current challenges these technologies as interface robotics.

Language: Английский

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Nanogenerators for smart cities in the era of 5G and Internet of Things

Joule, Journal Year: 2021, Volume and Issue: 5(6), P. 1391 - 1431

Published: April 19, 2021

Language: Английский

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