Advanced Soft Materials, Sensor Integrations, and Applications of Wearable Flexible Hybrid Electronics in Healthcare, Energy, and Environment

Advanced Materials, Год журнала: 2019, Номер 32(15)

Опубликована: Июль 8, 2019

Abstract Recent advances in soft materials and system integration technologies have provided a unique opportunity to design various types of wearable flexible hybrid electronics (WFHE) for advanced human healthcare human–machine interfaces. The biocompatible with miniaturized wireless systems is undoubtedly an attractive prospect the sense that successful device performance requires high degrees mechanical flexibility, sensing capability, user‐friendly simplicity. Here, most up‐to‐date materials, sensors, system‐packaging develop WFHE are provided. Details mechanical, electrical, physicochemical, properties discussed integrated sensor applications healthcare, energy, environment. In addition, limitations current discussed, as well key challenges future direction WFHE. Collectively, all‐inclusive review newly developed along summary imperative requirements material properties, capabilities, performance, skin integrations

Язык: Английский

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Graded intrafillable architecture-based iontronic pressure sensor with ultra-broad-range high sensitivity

Nature Communications, Год журнала: 2020, Номер 11(1)

Опубликована: Янв. 10, 2020

Abstract Sensitivity is a crucial parameter for flexible pressure sensors and electronic skins. While introducing microstructures (e.g., micro-pyramids) can effectively improve the sensitivity, it in turn leads to limited pressure-response range due poor structural compressibility. Here, we report strategy of engineering intrafillable that significantly boost sensitivity while simultaneously broadening responding range. Such feature undercuts grooves accommodate deformed surface microstructures, enhancing compressibility The iontronic sensor exhibits an unprecedentedly high ( S min > 220 kPa −1 ) over broad regime (0.08 Pa-360 kPa), ultrahigh resolution (18 Pa or 0.0056%) full range, together with remarkable mechanical stability. structure general design expected be applied other types achieve broader higher sensitivity.

Язык: Английский

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

Advanced Materials, Год журнала: 2021, Номер 33(47)

Опубликована: Апрель 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.

Язык: Английский

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Flexible piezoelectric pressure sensor based on polydopamine-modified BaTiO3/PVDF composite film for human motion monitoring

Sensors and Actuators A Physical, Год журнала: 2019, Номер 301, С. 111789 - 111789

Опубликована: Дек. 9, 2019

Язык: Английский

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Ultrasensitive and Highly Compressible Piezoresistive Sensor Based on Polyurethane Sponge Coated with a Cracked Cellulose Nanofibril/Silver Nanowire Layer

ACS Applied Materials & Interfaces, Год журнала: 2019, Номер 11(11), С. 10922 - 10932

Опубликована: Фев. 22, 2019

With the rapid development of flexible wearable electronics, a piezoresistive sensor with low detection limit and wide strain sensing range turns out to be great challenge for its application in this field. Here, cracked cellulose nanofibril/silver nanowire (CA) layer-coated polyurethane (PU) sponge was acquired through simple dip-coating process followed by precompression treatment. The electrical conductivity mechanical property conductive CA@PU could effectively tuned changing number. As sensor, exhibited capability detecting both small large motions over compression 0-80%. Based on "crack effect", possessed as 0.2% gauge factor [GF, GF = (Δ R/ R0)/ε, where Δ R, R0, ε represent instantaneous resistance change, original resistance, applied, respectively] high 26.07 0-0.6%. Moreover, "contact effect" enabled applicable larger strain, decreased first then became stable increasing strain. In addition, frequency- strain-dependent performances were observed, demonstrating that can respond reliably different applied frequencies strains. Furthermore, displayed exceptional stability, repeatability, durability 500 cycles. Finally, various human bodily motions, such phonation, stamping, knee bending, wrist bending. Most importantly, also potential fabrication artificial electronic skin. Herein, will undoubtedly promote high-performance electronics.

Язык: Английский

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Piezoelectric materials for flexible and wearable electronics: A review

Materials & Design, Год журнала: 2021, Номер 211, С. 110164 - 110164

Опубликована: Окт. 12, 2021

Self-powered devices and micro-sensors are in high demand for intelligent electronics flexible wearables applications medical healthcare human–computer interactive robotics. Flexible, stretchable, wearable breathable high-sensitivity sensors that monitor signals from subtle changes the environment provide solutions personalized healthcare. In this article, we review fundamental mechanisms, theoretical research, sensor fabrication methodologies, of piezoelectric materials. We focus on flexibility stretchability inorganic, polymer, bio-piezoelectric materials, explain their properties physiological signal monitoring, motion detection, force sensing. an overview latest progress piezoelectronics photonics, structures devices, self-powering technologies. compared 10 types polymers composites with human skin terms elastic modulus found PLLA/PDMS, electro-spun PVDF, ZnO/PVDF possess higher (50, 500, 27900 MPa respectively) than (18.8 MPa), thus being more suitable devices. electrical outputs polarized cast film has stronger property output 14–45.6 V filaments material (output 0.4–9 V). Future research development should increasing performance while maintaining required durability.

Язык: Английский

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Hybrid lead-free polymer-based nanocomposites with improved piezoelectric response for biomedical energy-harvesting applications: A review

Nano Energy, Год журнала: 2019, Номер 62, С. 475 - 506

Опубликована: Апрель 30, 2019

Язык: Английский

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Stretchable conductive nonwoven fabrics with self-cleaning capability for tunable wearable strain sensor

Nano Energy, Год журнала: 2019, Номер 66, С. 104143 - 104143

Опубликована: Окт. 1, 2019

Язык: Английский

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The Evolution of Flexible Electronics: From Nature, Beyond Nature, and To Nature

Advanced Science, Год журнала: 2020, Номер 7(20)

Опубликована: Авг. 28, 2020

Abstract The flourishing development of multifunctional flexible electronics cannot leave the beneficial role nature, which provides continuous inspiration in their material, structural, and functional designs. During evolution electronics, some originated from were even beyond others implantable or biodegradable eventually to nature. Therefore, relationship between nature is undoubtedly vital since harmony technology would promote sustainable development. Herein, materials selection functionality design for that are mostly inspired first introduced with certain Then, frontier advances on including main individual components (i.e., energy (the power source) sensor electric load)) presented aim enlightening harmonious modern Finally, critical issues next‐generation discussed provide possible solutions new insights prospective exploration directions.

Язык: Английский

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Highly Sensitive Capacitive Pressure Sensors over a Wide Pressure Range Enabled by the Hybrid Responses of a Highly Porous Nanocomposite

Advanced Materials, Год журнала: 2021, Номер 33(48)

Опубликована: Сен. 27, 2021

Abstract Past research aimed at increasing the sensitivity of capacitive pressure sensors has mostly focused on developing dielectric layers with surface/porous structures or higher constants. However, such strategies have only been effective in improving sensitivities low ranges (e.g., up to 3 kPa). To overcome this well‐known obstacle, herein, a flexible hybrid‐response sensor (HRPS) composed an electrically conductive porous nanocomposite (PNC) laminated ultrathin layer is devised. Using nickel foam template, PNC fabricated carbon nanotubes (CNTs)‐doped Ecoflex be 86% and conductive. The exhibits hybrid piezoresistive piezocapacitive responses, resulting significantly enhanced (i.e., more than 400%) over wide ranges, from 3.13 kPa −1 within 0–1 0.43 30–50 kPa. effect responses differentiated porosity high constants by comparing HRPS its purely counterparts. Fundamental understanding prediction optimal CNT doping are achieved through simplified analytical models. able measure pressures as subtle temporal arterial pulse large footsteps.

Язык: Английский

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