Skin-inspired flexible and high-sensitivity pressure sensors based on rGO films with continuous-gradient wrinkles

Jia, Jin; Huang, Guotao; Deng, Jianping; Pan, Kai

doi:10.1039/c8nr08503j

Cited by 142 publications

(106 citation statements)

References 58 publications

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“…The sensitivity of our sensor is higher than those of most tactile sensors . A few of the sensors reported higher sensitivity, but their highly sensitive range was quite limited to less than 1 kPa, and most of them exhibited a nonlinear response . Recently, a tactile sensor with multi‐layered microstructures, which exhibits high sensitivity (47.7 kPa ‒1 ) and linear response over broad pressure range (0.0013‒353 kPa), was proposed .…”

Section: Resultsmentioning

confidence: 91%

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Multi‐Layered, Hierarchical Fabric‐Based Tactile Sensors with High Sensitivity and Linearity in Ultrawide Pressure Range

Pyo

Lee

Kim

et al. 2019

Adv Funct Materials

146

147

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Resistive tactile sensors based on changes in contact area have been extensively explored for a variety of applications due to their outstanding pressure sensitivity compared to conventional tactile sensors. However, the development of tactile sensors with high sensitivity in a wide pressure range still remains a major challenge due to the trade‐off between sensitivity and linear detection range. Here, a tactile sensor comprising stacked carbon nanotubes and Ni‐fabrics is presented. The hierarchical structure of the fabrics facilitates a significant increase in contact area between them under pressure. Additionally, a multi‐layered structure that can provide more contact area and distribute stress to each layer further improves the sensitivity and linearity. Given these advantages, the sensor presents high sensitivity (26.13 kPa−1) over a wide pressure range (0.2–982 kPa), which is a significant enhancement compared with the results obtained in previous studies. The sensor also exhibits outstanding performances in terms of response time, repeatability, reproducibility, and flexibility. Furthermore, meaningful applications of the sensor, including wrist‐pulse‐signal analysis, flexible keyboards, and tactile interface, are successfully demonstrated. Based on the facile and scalable fabrication technique, the conceptually simple but powerful approach provides a promising strategy to realize next‐generation electronics.

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Section: Resultsmentioning

confidence: 91%

“…Recently, resistive tactile sensors with enhancement in both sensitivity and linearity are reported based on the structural design . A typical structure of these sensors consists of two opposing films coated with conductive materials, and they exploit a change in contact resistance between the films.…”

Section: Introductionmentioning

confidence: 99%

Multi‐Layered, Hierarchical Fabric‐Based Tactile Sensors with High Sensitivity and Linearity in Ultrawide Pressure Range

Pyo

Lee

Kim

et al. 2019

Adv Funct Materials

146

147

View full text Add to dashboard Cite

show abstract

“…For example, to climb a vertical wall, the feet of the gecko have developed a kind of special hierarchical structure so that maximized contact area and intermolecular interactions could be realized [108], the self-cleaning ability of a lotus leaf mainly depends on the hydrophobic hierarchical structure of its surface [109], and the epidermal ridges on the surface of the human skin help us perceive the world. These typical examples have inspired us to design biomimetic materials for the fabrication of tactile sensors used in E-skin applications [110][111][112]. b Relative change in the sensor's current and pressure curves.…”

Section: Graphene Tactile Sensors Draw Inspiration From Naturementioning

confidence: 99%

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

et al. 2019

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HIGHLIGHTS• Tremendous progress has been advanced by research into graphene and its derivatives with great benefits toward low-cost, portable, and real-time tactile sensors/electronic skin.• The review presented herein direct future efforts aimed at high-quality graphene-based tactile sensors and their implications for the wider scientific community.• The paper also are informative regarding some basic and crucial issues regarding graphene and its derivatives, such as charge-transport principles, doping/trapping behaviors, correlations between structure/morphology and properties/functions.ABSTRACT Skin is the largest organ of the human body and can perceive and respond to complex environmental stimulations. Recently, the development of electronic skin (E-skin) for the mimicry of the human sensory system has drawn great attention due to its potential applications in wearable human health monitoring and care systems, advanced robotics, artificial intelligence, and human-of graphene materials; (2) state-of-the-art protocols recently developed for high-performance tactile sensing, including representative examples; and (3) perspectives and current challenges for graphene-based tactile sensors in E-skin applications. A summary of these cutting-edge developments intends to provide readers with a deep understanding of the future design of high-quality tactile sensing devices and paves a path for their future commercial applications in the field of E-skin.

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“…In the past decade, considerable progress has been made on wearable electronic devices including artificial electronic skins (E‐skins) 1–6. Owing to the capability to transduce physical signals (e.g., pressure, strain, temperature, perspiration, and other stimuli) into electric signals,1–10 E‐skins have massive potentials in the applications for human motion detection,11,12 health monitoring,3,13–15 bionics,4,8 artificial intelligence,14b and so on. As a fundamental part of E‐skins, pressure sensors with a high sensitivity and a low detection limit (DL) are highly desired1–4,11,16,17 because these two of the most important performances are intimately related to the applications.…”

Section: Introductionmentioning

confidence: 99%

Light‐Boosting Highly Sensitive Pressure Sensors Based on Bioinspired Multiscale Surface Structures

Wang

et al. 2020

Adv Funct Materials

114

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Pressure sensors have attracted tremendous attention because of their potential applications in the fields of health monitoring, human-machine interfaces, artificial intelligence, and so on. Improving pressure-sensing performances, especially the sensitivity and the detection limit, is of great importance to expand the related applications, however it is still an enormous challenge so far. Herein, highly sensitive piezoresistive pressure sensors are reported with novel light-boosting sensing performances. Rose petal-templated positive multiscale millimeter/micro/nanostructures combined with surface wrinkling nanopatterns endow the assembled pressure sensors with outstanding pressure sensing performance, e.g. an ultrahigh sensitivity (70 KPa −1 , <0.5 KPa), an ultralow detection limit (0.88 Pa), a wide pressure detect ion range (from 0.88 Pa to 32 KPa), and a fast response time (30 ms). Remarkably, simple light illumination further enhances the sensitivity to 120 KPa −1 (<0.5 KPa) and lowers the detection limit to 0.41 Pa. Furthermore, the flexible light illumination offers unprecedented capabilities to spatiotemporally control any target in multiplexed pressure sensors for optically enhanced/tailorable sensing performances. This light-control strategy coupled with the introduction of bioinspired multiscale structures is expected to help design next generation advanced wearable electronic devices for unprecedented smart applications.

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Skin-inspired flexible and high-sensitivity pressure sensors based on rGO films with continuous-gradient wrinkles

Abstract: A skin-like gradient-wrinkle rGO film with a hierarchical structure that showed ultrahigh sensitivity and a special motion-direction detection of moving objects.

Cited by 142 publications

References 58 publications

Multi‐Layered, Hierarchical Fabric‐Based Tactile Sensors with High Sensitivity and Linearity in Ultrawide Pressure Range

Multi‐Layered, Hierarchical Fabric‐Based Tactile Sensors with High Sensitivity and Linearity in Ultrawide Pressure Range

Graphene Nanostructure-Based Tactile Sensors for Electronic Skin Applications

Light‐Boosting Highly Sensitive Pressure Sensors Based on Bioinspired Multiscale Surface Structures

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