HACS: Helical Auxetic Yarn Capacitive Strain Sensors with Sensitivity Beyond the Theoretical Limit (Adv. Mater. 10/2023)

Cuthbert, Tyler J.; Hannigan, Brett C.; Roberjot, Pierre; Shokurov, Alexander V.; Menon, Carlo

doi:10.1002/adma.202370072

Cited by 5 publications

(3 citation statements)

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“…[81] Solving these issues hinges on the design of stretchable flexible capacitive sensors. [82] Cuthbert et al [55] proposed for the first time the use of helical decompression wires as capacitive sensors. Their performance depends on two main variables -diameter ratio and helical winding length, allowing to obtain GFs up to 4 at low strains.…”

Section: Capacitivementioning

confidence: 99%

Reviews on Flexible Force Sensors Based on Fiber Assemblies with Mass Production Efficiency

Wu,

Jin,

Xia

et al. 2024

Adv Materials Technologies

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Flexible force sensors show great potential applications in smart wearable devices based on their softness and ease of deformation. Textiles are extremely compatible with the human body, where mechanical forces generated by human movements and physiological activities create rich application scenarios for flexible force sensors. Currently, the bottleneck in the development of flexible sensors depends on the breakthrough of mass production efficiency, which has been a research focus in recent years to accelerate the application of smart textiles in various fields. This work reviews the research progress of flexible force sensors based on fiber assemblies with mass production efficiency, which is discussed in four aspects: sensing mechanisms, structure design, preparation methods, and application. Finally, the challenges faced by mass production of flexible force sensors are analyzed and summarized, and a few inspirations for their future development direction are provided.

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Section: Capacitivementioning

confidence: 99%

Reviews on Flexible Force Sensors Based on Fiber Assemblies with Mass Production Efficiency

Wu,

Jin,

Xia

et al. 2024

Adv Materials Technologies

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“…Auxetic materials constitute a unique class of substances, distinguished by their remarkable property of lateral expansion when subjected to longitudinal stretching. Owing to these distinctive structural qualities, auxetic materials have found application in various technical fields, such as shock protection, the medical industry, aviation wing design, and even sensor technology (Imbalzano et al, 2017;Lihong et al, 2019;Masoud et al, 2023;A et al, 2022;Budarapu and Natarajan, 2016;J et al, 2023;Frank et al, 2021). Stretchable strain sensors employ mechanical ancillary metamaterials with negative Poisson's ratios because they have a high sensitivity (Taherkhani et al, 2020).…”

Section: Analytical and Numerical Models 21 Auxetic Structurementioning

confidence: 99%

Design and Evaluation of Auxetic Structures as Displacement Sensor

Zhang,

Wen,

et al. 2023

Smart Manufacturing and Material Processing (SMMP)

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In the field of engineering measurement, the displacement sensor is a widely used tool. In this study, a novel method has been developed for measuring displacement. The newly introduced approach aims to address the demand for improved sensitivity, accuracy, and efficiency in displacement measurements, thereby contributing to advancements in various engineering applications and providing valuable insights for future sensor development. The proposed method involves the conversion of stress deformation-induced position changes in auxetic structures into output current changes, providing acceptable measurement accuracy and reliable means of measuring displacement. To evaluate the efficacy of proposed method, three different structures are utilized for analysis and experimental testing in this study, and their performance is comparatively evaluated. The discoveries in this study will present fresh possibilities for employing auxetic materials in the domain of measurement. 3D printing technology is employed for the fabrication of the auxetic structures, rather than conventional subtractive manufacturing methods. 3D printing technology has completely revolutionized various industries, and in the field of measurement, its potential remains largely untapped. By exploring innovative applications, we can expand its utility, simplify the complexity associated with sensor manufacturing, and achieve significant cost reductions. This article delves into the exciting possibilities that 3D printing brings to measurement and sensor production, paving the way for groundbreaking advancements.

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“…Large amounts of artificial helical structures have been exploited by the self-assembled formation based on special DOI: 10.1002/adfm.202305244 geometric features combined with thermal or stress fields during fabrication, including spinning, [3] electrospinning, [4] and biomaterial template manufacturing. [5] With sophisticated structure of helix, various applications have been realized in wide fields such as stimulus-response actuators, [6] remote sensors, [7] helical microrobotics or micromachines, [8] damage resistant composites, [9] 3D crack regulation, [10] etc. In the field of specialized wettable materials, structural regulation of specific patterns and paths is critical for controllable wettability and is often inspired by microstructures of creatures such as lotus, cactus, and spider silk.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Robust Helical‐Groove Spindle‐Knot Microfibers for Large‐Scale Water Collection

Wang

Zhu

et al. 2023

Adv Funct Materials

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Helical structure is ubiquitous in nature with high‐order configuration, specific paths, large superficial areas, providing an approach to bioinspired wettability control. Owing to its special hydrophilic rough surfaces and periodic knot and joint structure, natural spider silk can catch tiny droplets in fog and transport them directionally, sparking scientific interest in bioinspired knotted microfibers to address the risk of water scarcity. To further enhance the water collection ability, a bioinspired helical‐groove‐modified spindle‐knot (HSK) microfiber is continuously fabricated in this work by a simple coating method combined with crack regulation. The formation and morphology can be precisely manipulated by adjusting the drawing velocity and concentration of the coating solution. Compared with smooth spindle‐knot microfibers, HSK exhibits greater performances of wetting speed, droplets growth rate, and hanging ability, which can be attributed to the unique helical paths that bring capillary force difference and offer extra three‐phase contact line lengths for water collection behavior. The maximum droplet volume is almost 2114 times that of the microfiber knots, which is the highest compared with previous reports. Moreover, HSK microfibers are endowed with repairable wettability, long‐term durability, excellent mechanical properties, and flexibility, showing great potential in the realm of applications for large‐scale water collection.

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HACS: Helical Auxetic Yarn Capacitive Strain Sensors with Sensitivity Beyond the Theoretical Limit (Adv. Mater. 10/2023)

Cited by 5 publications

References 0 publications

Reviews on Flexible Force Sensors Based on Fiber Assemblies with Mass Production Efficiency

Reviews on Flexible Force Sensors Based on Fiber Assemblies with Mass Production Efficiency

Design and Evaluation of Auxetic Structures as Displacement Sensor

Bioinspired Robust Helical‐Groove Spindle‐Knot Microfibers for Large‐Scale Water Collection

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