Iontronic pressure sensor with high sensitivity and linear response over a wide pressure range based on soft micropillared electrodes

Lü, Peng; Wang, Liu; Zhu, Pang; Huang, Jun; Wang, Yueji; Bai, Ningning; Wang, Yan; Li, Gang; Yang, Junlong; Xie, Kewei; Zhang, Jianming; Yu, Bo; Dai, Yongheng; Guo, Chuan Fei

doi:10.1016/j.scib.2021.02.019

Cited by 156 publications

(85 citation statements)

References 37 publications

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“…), conductive fillers (e.g., MXene, [26] carbon nanotube (CNT), [14,25] etc.) or even ionic liquids (e.g., H 3 PO 4 , [16] 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSA]), [30] etc.) have been extensively studied to improve the dielectric property of dielectrics and hence the sensitivity of sensors.…”

Section: Doi: 101002/smll202103312mentioning

confidence: 99%

Gradient Architecture‐Enabled Capacitive Tactile Sensor with High Sensitivity and Ultrabroad Linearity Range

Zhou

Lei

et al. 2021

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114

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The sensitivity and linearity are critical parameters that can preserve the high pressure‐resolution across a wide range and simplify the signal processing process of flexible tactile sensors. Although extensive micro‐structured dielectrics have been explored to improve the sensitivity of capacitive sensors, the attenuation of sensitivity with increasing pressure is yet to be fully resolved. Herein, a novel dielectric layer based on the gradient micro‐dome architecture (GDA) is presented to simultaneously realize the high sensitivity and ultrabroad linearity range of capacitive sensors. The gradient micro‐dome pixels with rationally collocated amount and height can effectively regulate the contact area and hence enable the linear variation in effective dielectric constant of the GDA dielectric layer under varying pressures. With systematical optimization, the sensor exhibits the high sensitivity of 0.065 kPa−1 in an ultrabroad linearity range up to 1700 kPa, which is first reported. Based on the excellent sensitivity and linearity, the high pressure‐resolution can be preserved across the full scale of pressure spectrum. Therefore, potential applications such as all‐round physiological signal detection in diverse scenarios, control instruction transmission with combinatorial force inputs, and convenient Morse code communication with non‐overlapping capacitance signals are successfully demonstrated through a single sensor device.

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Section: Doi: 101002/smll202103312mentioning

confidence: 99%

Gradient Architecture‐Enabled Capacitive Tactile Sensor with High Sensitivity and Ultrabroad Linearity Range

Zhou

Lei

et al. 2021

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114

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“…[96][97][98] The micro-nano structure on the surface of the active layers has been demonstrated to be a promising approach to dramatically enhance the sensitivity of the tactile sensors. [40,[99][100][101] By designing micro-nano structures on the material surface, it can reduce the material viscoelasticity to some extent and make the contact area at the interface more sensitive toward external stimuli changes, thereby greatly improving the sensitivity and shortening the response time. [30] The micro-nano structure also improves the hydrophobicity of the interface, so it effectively avoids the influence of environmental humidity on the long-term stability of the sensors and successfully prolongs the service life of the sensors.…”

Section: Supercapacitive Iontronic Tactile Sensorsmentioning

confidence: 99%

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

Niu

Zhang

Yue

et al. 2021

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“…the EDL area increases. So the capacitance of the sensor can be regarded as the sum of numerous EDL capacitance [65,78] (Figure 5(c)). EDL effect based sensors usually have ultrahigh pressure sensitivity, high noise immunity, high pressure resolution, high spatial definition, and optical transparency.…”

Section: Interfacial Iontronic Typementioning

confidence: 99%

Ionogel-based flexible stress and strain sensors

Zhao

Liu

Wang

et al. 2021

International Journal of Smart and Nano Materials

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Ionogels is a kind of hybrid materials composed of ionic liquids (ILs) and solid polymer network matrix, has been extensively investigated in the most recent decade. Due to the excellent mechanical properties and ionic conductivity, their promising applications in flexible stress and strain sensors have been proposed and explosively developed. In this review, we briefly summarize research progresses on ionogel based flexible stress and strain sensors (IFSSs) from five aspects, including material synthesis, device fabrication, working principles, characteristics and performances, and potential applications. Some outlooks and perspectives are also proposed at the end of review. The review is expected to provide reference and new insights into the research of IFSS.

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Iontronic pressure sensor with high sensitivity and linear response over a wide pressure range based on soft micropillared electrodes

Cited by 156 publications

References 37 publications

Gradient Architecture‐Enabled Capacitive Tactile Sensor with High Sensitivity and Ultrabroad Linearity Range

Gradient Architecture‐Enabled Capacitive Tactile Sensor with High Sensitivity and Ultrabroad Linearity Range

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

Ionogel-based flexible stress and strain sensors

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