Piezoresistive Pressure Sensor Based on Synergistical Innerconnect Polyvinyl Alcohol Nanowires/Wrinkled Graphene Film

Liu, Weijie; Liu, Nishuang; Yang, Yue; Rao, Jing; Cheng, Feng; Su, Jun; Liu, Zhitian; Gao, Yihua

doi:10.1002/smll.201704149

Cited by 199 publications

(149 citation statements)

References 54 publications

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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

115

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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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Section: Introductionmentioning

confidence: 99%

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

Wang

et al. 2020

Adv Funct Materials

115

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“…Among them, the pressure/strain sensors based on the piezoresistive effect are widely prepared for physical physiological information detection due to their simple device structure and large measuring range. For the 2D materials of graphene, rGO, and MXenes, they are widely used in the flexible piezoresistive pressure or strain sensor due to their high conductivity and excellent mechanical properties . To fabricate high‐performance mechanical sensors, highly conductive 2D materials with microflakes would be beneficial to the enhancement of their key parameters such as sensitivity, measuring range, detection limit, and so on.…”

Section: Human Physical Signals Detectionmentioning

confidence: 99%

Wearable Electronics Based on 2D Materials for Human Physiological Information Detection

Pang

Yang

et al. 2019

Small

113

118

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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/smll.201901124. Recently, advancement in materials production, device fabrication, and flexi ble circuit has led to the huge prosperity of wearable electronics for human healthcare monitoring and medical diagnosis. Particularly, with the emergence of 2D materials many merits including light weight, high stretchability, excellent biocompatibility, and high performance are used for those potential applications. Thus, it is urgent to review the wearable electronics based on 2D materials for the detection of various human signals. In this work, the typical graphene-based materials, transition-metal dichalcogenides, and transition metal carbides or carbonitrides used for the wearable electronics are discussed. To well understand the human physiological information, it is divided into two dominated categories, namely, the human physical and the human chemical signals. The monitoring of body temperature, electrograms, subtle signals, and limb motions is described for the physical signals while the detection of body fluid including sweat, breathing gas, and saliva is reviewed for the chemical signals. Recent progress and development toward those specific utilizations are highlighted in the Review with the representative examples. The future outlook of wearable healthcare techniques is briefly discussed for their commercialization. Wearable Electronics

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“…[ 11–15 ] Among the different kinds of pressure sensors, piezoresistive pressure sensor demonstrates great application potential because of its fast response speed, simple structure, economical fabrication process and great stability. [ 16–20 ] Improvement of sensitivity of pressure sensors is critical for the high precision and ultrasensitive pressure detection, [ 21–25 ] which is however a challenging task because the key effect of device configuration on the sensitivity is always neglected.…”

Section: Figurementioning

confidence: 99%

Synergistic Resistance Modulation toward Ultrahighly Sensitive Piezoresistive Pressure Sensors

Yuan

Wang

et al. 2020

Adv Materials Technologies

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In recent years, with the rapid development of prosthesis, [1,2] health monitoring, [3][4][5][6][7] and robot, [8][9][10] electronic skin has drawn huge research enthusiasm. Tactile sensation is one of the most significant functions of electronic skin, which mainly relies on pressure sensor to realize. [11][12][13][14][15] Among the different kinds of pressure sensors, piezoresistive pressure sensor demonstrates great application potential because of its fast response speed, simple structure, economical fabrication process and great stability. [16][17][18][19][20] Improvement of sensitivity of pressure sensors is critical for the high precision and ultrasensitive pressure detection, [21][22][23][24][25] which is however a challenging task because the key effect of device configuration on the sensitivity is always neglected.Until now, the commonly used strategy to improve sensitivity focuses on the development of different kinds of microstructure of active materials, but this strategy is still not effective enough to achieve ultrahigh sensitivity. [26][27][28] For example, Fang et al. replicated the lotus leaf surface onto the polydimethylsiloxane (PDMS) substrate to produce a structured layer and then sprayed graphene films as active electrodes, [29] which yields a sensitivity of 1.2 kPa −1 . Jong-jin Park et al. reported a sensor with sensitivity of 10.32 kPa −1 by introducing a pyramidical electrode consisting of a conductive polymer (PEDOT:PSS) and an aqueous polyurethane dispersion (PUD) elastomer blend. [30] Bao et al. prepared a new piezoresistive sensor with sensitivity up to 41.9 kPa −1 by preparing interconnected polypyrrole (PPY) hollow sphere structure through a multiphase synthesis technique. [31] These researches have significantly advanced the development of piezoresistive sensors, but still could not achieve ultrahigh sensitivity to meet the requirement of high precision and ultrasensitive detection. This is because the surface microstructure of active materials is not the only key factor for the improvement of sensitivity.To overcome the current obstacle and get ultrathigh sensitivity, it would be necessary to understand the basic working principle of piezoresistive pressure sensor, and further get the feasible solution. The basic electrical characteristics of piezoresistive sensor is similar, and the total resistance (R total ) of the device consists of two parts: the body resistance (R b ) Improvement of sensitivity of electrical piezoresistive sensors is critical for high-precision and ultrasensitive detection, which mainly depends on the modulation ability of total resistance of sensor under applied pressure. However, in most of the reported sensor devices, the contact resistance and body resistance (the key parts of total resistance of sensor) generally cannot be modulated simultaneously, which results in the limited sensitivity. In this work, an ultrahighly sensitive piezoresistive pressure sensor with an exquisitely designed structure is demonstrated, providing an uncomparable advantage of ...

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Piezoresistive Pressure Sensor Based on Synergistical Innerconnect Polyvinyl Alcohol Nanowires/Wrinkled Graphene Film

Cited by 199 publications

References 54 publications

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

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

Wearable Electronics Based on 2D Materials for Human Physiological Information Detection

Synergistic Resistance Modulation toward Ultrahighly Sensitive Piezoresistive Pressure Sensors

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