Flexible Strain Sensor Based on Carbon Black/Silver Nanoparticles Composite for Human Motion Detection

Zhang, Weiyi; Liu, Qiang; Chen, Peng

doi:10.3390/ma11101836

Cited by 93 publications

(74 citation statements)

References 49 publications

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“…Transmission electron microscopy (TEM) image of Ag NPs (scale bar, 50 nm): Reproduced under the terms of the CC-BY Creative Commons Attribution 4.0 International icense (https://creativecommons.org/licenses/by/4.0/). [60] Copyright 2018, The Authors. Published by MDPI.…”

Section: Materials Approachesmentioning

confidence: 99%

Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

et al. 2019

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201902133.Wearable electronics have revolutionized the way physiological parameters are sensed, detected, and monitored. In recent years, advances in flexible and stretchable hybrid electronics have created emergent properties that enhance the compliance of devices to our skin. With their unobtrusive attributes, skin conformable sensors enable applications toward real-time disease diagnosis and continuous healthcare monitoring. Herein, critical perspectives of flexible hybrid electronics toward the future of digital health monitoring are provided, emphasizing its role in physiological sensing. In particular, the strategies within the sensor composition to render flexibility and stretchability while maintaining excellent sensing performance are considered. Next, novel approaches to the functionalization of the sensor for physical or biochemical stimuli are extensively covered. Subsequently, wearable sensors measuring physical parameters such as strain, pressure, temperature, as well as biological changes in metabolites and electrolytes are reported. Finally, their implications toward early disease detection and monitoring are discussed, concluding with a future perspective into the challenges and opportunities in emerging wearable sensor designs for the next few years. Wearable SensorsRecent progress in flexible and stretchable electronic systems has ignited exciting applications in consumer electronics, human computer interactions, augmented reality devices, and electronic skins. [1][2][3] Among these, a significant interest lies in health monitoring, [4][5][6] where vital functions may be measured continuously. Continuous health monitoring is far more superior than conventional healthcare workflow as the conventional approach can only offer snapshots of the physiological condition Figure 3. Material substrates for flexible and stretchable electronics, highlighting the advantages of choices for each material type. a) Common polymeric materials by order of glass transition temperatures. Reproduced with permission. [29] Copyright 2015, Elsevier. b) Schematic representation of crosslinked elastomeric substrates possessing configuration entropy. Reproduced with permission. [22]

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Section: Materials Approachesmentioning

confidence: 99%

Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

et al. 2019

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“…The most recent publications on strain sensors look into creating high performing multifunctional devices by combining different conductive fillers in elastomeric substrates. Some of these hybrid strain sensors were fabricated using ionic liquids (glycerol and potassium chloride)/graphene in Ecoflex™ [392], conductive networks of silver nanoparticles/graphene in thermoplastic PU [376], nanowires/microfluidic (PEDOT:PSS solution in microchannels) in Ecoflex™ [393], and Carbon Black/Silver Nanoparticles in thermoplastic PU [394]. A thermoplastic polyurethane based on Graphene/Silver Nanoparticles strain sensor had a gauge factor ranging from 7 to 476, a stretchability of 1000% and a high working stability (>1000 cycles at 50% strain) [376].…”

Section: Resistive Strain Sensorsmentioning

confidence: 99%

“…Most of the resistive sensors that were based on ionic liquids and hydrogels showed linear response to strain, nevertheless they had gauge factors below 4 [385][386][387][388]. The hybrid, resistive-type strain sensors demonstrated high gauge factors along with a high stretchability [376,[392][393][394]. The capacitive strain sensors showed lower hysteresis when compared to the resistive sensors, however they demonstrated smaller gauge factors.…”

Section: Piezoelectric and Other Strain Sensorsmentioning

confidence: 99%

“…Human body motion detection is a biomedical application that requires flexible sensors to be capable of sensing in multiple directions (multiaxial strain detection) with a certain degree of accuracy [90,372]. The detection of the bending of human joints was achieved with conformal stretchable elastic patches using PDMS [322], TPU [394], Ecoflex [385], and natural rubber [383]. Multiple flexible PVDF patches have been constructed to detect the individual bending of fingers in a hand [629].…”

Section: Health Monitoringmentioning

confidence: 99%

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Flexible Sensors—From Materials to Applications

et al. 2019

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Flexible sensors have the potential to be seamlessly applied to soft and irregularly shaped surfaces such as the human skin or textile fabrics. This benefits conformability dependant applications including smart tattoos, artificial skins and soft robotics. Consequently, materials and structures for innovative flexible sensors, as well as their integration into systems, continue to be in the spotlight of research. This review outlines the current state of flexible sensor technologies and the impact of material developments on this field. Special attention is given to strain, temperature, chemical, light and electropotential sensors, as well as their respective applications.

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“…A very recent work presents a simple and low-cost way to manufacture piezoresistive sensors using a composite of carbon black, a matrix of thermoplastic polyurethane and silver nanoparticles as sensing material [22]. This strain sensor shows more or less 18 times improvement in sensitivity at maximum strain compared with bare carbon black-based sensors.…”

Section: Piezoresistive Sensorsmentioning

confidence: 99%

Body Area Networks in Healthcare: A Brief State of the Art

et al. 2019

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A body area network (BAN) comprises a set of devices that sense their surroundings, activate and communicate with each other when an event is detected in its environment. Although BAN technology was developed more than 20 years ago, in recent years, its popularity has greatly increased. The reason is the availability of smaller and more powerful devices, more efficient communication protocols and improved duration of portable batteries. BANs are applied in many fields, healthcare being one of the most important through gathering information about patients and their surroundings. A continuous stream of information may help physicians with making well-informed decisions about a patient's treatment. Based on recent literature, the authors review BAN architectures, network topologies, energy sources, sensor types, applications, as well as their main challenges. In addition, the paper focuses on the principal requirements of safety, security, and sustainability. In addition, future research and improvements are discussed.

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Flexible Strain Sensor Based on Carbon Black/Silver Nanoparticles Composite for Human Motion Detection

Cited by 93 publications

References 49 publications

Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

Flexible Hybrid Sensors for Health Monitoring: Materials and Mechanisms to Render Wearability

Flexible Sensors—From Materials to Applications

Body Area Networks in Healthcare: A Brief State of the Art

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