Highly sensitive printed crack-enhanced strain sensor as dual-directional bending detector

Xiao, Yuzhou; Jiang, Shuwen; Li, Yanrong; Zhang, Wanli

doi:10.1088/1361-665x/ab75a2

Cited by 29 publications

(24 citation statements)

References 44 publications

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“…In addition, the sensitivity could be controlled by the dimension effect. Table 2 presents the excellent performance of the CB/AgNP pastes in terms of sensitivity in comparison with the previous results in the literature [26][27][28][29][30][31][32][33]. The CB/AgNP paste could generate a high GF because the variation of junction resistance was severe under tension pressure, as shown in Figure 4b.…”

Section: Resultssupporting

confidence: 54%

Printability of the Screen-Printed Strain Sensor with Carbon Black/Silver Paste for Sensitive Wearable Electronics

Xue

Hwang

et al. 2020

Applied Sciences

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Printing technology enables not only high-volume, multipurpose, low-impact, low-cost manufacturing, but also the introduction of flexible electronic devices, such as displays, actuators, and sensors, to a wide range of consumer markets. Consequently, in the past few decades, printed electronic products have attracted considerable interest. Although flexible printed electronic products are attracting increasing attention from the scientific and industrial communities, a systematic study on their sensing performance based on printability has not been reported so far. In this study, carbon black/Ag nanocomposites were utilized as pastes for a flexible wearable strain sensor. The effects of the rheological property of the pastes and the pattern dimensions of the printed electrodes on the sensor’s performance were investigated. Consequently, the printed sensor demonstrated a high gauge factor of 444.5 for an applied strain of 0.6% to 1.4% with a durability of 1000 cycles and a linearity of R2 = 0.9974. The sensor was also stable under tough environmental conditions.

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Section: Resultssupporting

confidence: 54%

Printability of the Screen-Printed Strain Sensor with Carbon Black/Silver Paste for Sensitive Wearable Electronics

Xue

Hwang

et al. 2020

Applied Sciences

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“…The basic materials composition for flexible strain sensors cover flexible and stretchable support substrate and conductive nanomaterials. To prepare strain sensors with high flexibility and stretchability (even with self-healing function [ 82 ]), polymers including PDMS, [ 83 ] PU, [ 84 ] polyethylene terephthalate (PET), [ 85 ] rubbers, [ 86 ] Ecoflex, [ 87 ] polyamide, [ 88 ] polytetrafluoroethylene (PTFE), [ 89 ] polyvinyl chloride (PVC) [ 90 ], etc., were employed as different support substrates or flexible framework structure. Furthermore, nanomaterials with excellent conductivity and mechanical properties (including advanced carbon materials, nano-metal materials, and the hybrids) have been widely utilized for the sensor fabrication ( Figure 3 ).…”

Section: Materials Developmentmentioning

confidence: 99%

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Han

Chen

et al. 2021

Nanomaterials

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With the recent great progress made in flexible and wearable electronic materials, the upcoming next generation of skin-mountable and implantable smart devices holds extensive potential applications for the lifestyle modifying, including personalized health monitoring, human-machine interfaces, soft robots, and implantable biomedical devices. As a core member within the wearable electronics family, flexible strain sensors play an essential role in the structure design and functional optimization. To further enhance the stretchability, flexibility, sensitivity, and electricity performances of the flexible strain sensors, enormous efforts have been done covering the materials design, manufacturing approaches and various applications. Thus, this review summarizes the latest advances in flexible strain sensors over recent years from the material, application, and manufacturing strategies. Firstly, the critical parameters measuring the performances of flexible strain sensors and materials development contains different flexible substrates, new nano- and hybrid- materials are introduced. Then, the developed working mechanisms, theoretical analysis, and computational simulation are presented. Next, based on different material design, diverse applications including human motion detection and health monitoring, soft robotics and human-machine interface, implantable devices, and biomedical applications are highlighted. Finally, synthesis consideration of the massive production industry of flexible strain sensors in the future; different fabrication approaches that are fully expected are classified and discussed.

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“…Moreover, the sensor can only be placed on the stretched part of the soft body given that most stretchable strain sensors are developed to measure tensile strain rather than compression. Recently, a crack‐enhanced flexible strain sensor [ 14 ] with bidirectional strain sensing capabilities and extremely high sensitivity to small strain was developed to ease these limitations. In the case of folding angle sensing in wearable systems, [ 6 ] only the surface area close to the folding axis (joint) is significantly stretched.…”

Section: Introductionmentioning

confidence: 99%

Folding and Bending Planar Coils for Highly Precise Soft Angle Sensing

Wang

Totaro

Veerapandian

et al. 2020

Adv Materials Technologies

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Sensors detecting angles created by deformable structures play an increasing role in soft robotics and wearable systems. However, the typical sensing method based on strain measurement strongly depends on the viscoelastic behaviors of soft substrates and on the location of sensors that affect the sensing reliability. In this work, the changes in magnetic field coupling produced in space by planar coil deformation are investigated, for implementing a new direct transduction strategy, the soft inductive angle sensing (SIAS). A numerical analysis tool is developed for rigorously studying the inductance variations resulting from planar coils’ bending, folding, and folding with a small arc. Copper or liquid metal coils, having different shapes, pitches, and sizes are built and characterized. Results show that the SIAS is hysteresis‐free, velocity‐independent, highly sensitive, ultrastable, and with fast response, guaranteeing highly precise (0.1° incremental folding angle change) and reliable measurements. It is insensitive to coil materials and to behavior of embedding soft materials, and scalable (across 10 times scale). The SIAS is adopted in three case studies (a self‐sensing origami, a sensorized soft pneumatic actuator, and a wearable sensor) to highlight its low implementation complexity, high‐performance, and versatility, providing some insights on the enormous potential of this mechanism.

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Highly sensitive printed crack-enhanced strain sensor as dual-directional bending detector

Cited by 29 publications

References 44 publications

Printability of the Screen-Printed Strain Sensor with Carbon Black/Silver Paste for Sensitive Wearable Electronics

Printability of the Screen-Printed Strain Sensor with Carbon Black/Silver Paste for Sensitive Wearable Electronics

Materials, Electrical Performance, Mechanisms, Applications, and Manufacturing Approaches for Flexible Strain Sensors

Folding and Bending Planar Coils for Highly Precise Soft Angle Sensing

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