Graded intrafillable architecture-based iontronic pressure sensor with ultra-broad-range high sensitivity

Bai, Ningning; Wang, Liu; Wang, Qi; Deng, Jue; Wang, Yan; Lü, Peng; Huang, Jun; Li, Gang; Zhang, Yuan; Yang, Junlong; Xie, Kewei; Zhao, Xuanhe; Guo, Chuan Fei

doi:10.1038/s41467-019-14054-9

Cited by 479 publications

(467 citation statements)

References 43 publications

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“…This approach is much less expensive than photolithography techniques, nevertheless it does not allow for design changes in the micro-structuring due to limitations regarding the objects available to act as molds. Several objects have been used as molds, from sandpaper [ 130 , 166 , 167 , 168 , 169 , 170 , 171 ] to paper [ 39 ], leaves of several plants’ species [ 38 , 43 , 142 , 172 , 173 , 174 , 175 , 176 , 177 ], insect wings [ 142 ], animals skin [ 178 ], and fabrics [ 140 , 179 , 180 , 181 , 182 ]. PDMS is once again the most chosen material for the micro-structured films [ 38 , 39 , 130 , 140 , 142 , 167 , 168 , 169 , 172 , 173 , 174 , 175 , 176 , 177 , 178 , 179 , 182 ], as well as PDMS-based composites with graphite [ 166 , 170 ] or carbon nanotubes (CNTs) [ 181 ].…”

Section: Pressure Sensorsmentioning

confidence: 99%

“…For some sensors, it is common to coat PDMS films with gold [ 38 , 169 ], silver nanowires [ 39 , 173 , 176 ], rGO [ 130 , 168 ], CNTs [ 167 , 172 ], SWCNTs [ 179 ], graphene [ 172 , 174 , 175 , 182 ], and PEDOT:PSS [ 178 ] through vapor deposition methods [ 38 , 169 ], spray-coating [ 39 , 167 , 175 , 176 ], dip-coating [ 168 , 179 ], and transfer methods [ 172 , 174 , 182 ]. Polyimide [ 39 , 43 , 171 ] and PET with ITO [ 166 , 170 , 177 ] are common substrates as well. Treatments of the sensing film , such as PDMS heating [ 183 , 184 ], PDMS stretching and UV or oxygen plasma exposure [ 75 , 141 , 185 , 186 ], and self-assembly or chemical reaction [ 86 , 99 , 135 , 184 , 187 , 188 , 189 , …”

Section: Pressure Sensorsmentioning

confidence: 99%

“… Sandpaper as mold 131.5 (0–1.5) 11.73 (5–28) 1.12 Pa/ 32 kPa 43/71 7000 (L) 0.5 V/- (♡ ) C R.-W. Li [ 86 ] 2020 Micro-needles (diameter between 166 µm and 422 µm, height between 275 µm and 856 µm) of PDMS and Ni-coated magnetic particles of Ag. Self-assembly 0.159 (0–1) 0.019 (1.5–11) 4.1 × 10 −3 (12–145) 1.9 Pa/ 145 kPa 49/51 9200 (L) -/- ( ) C C. F. Guo [ 171 ] 2020 Iontronic protrusions, and elec. of Au on PI.…”

Section: Table A1mentioning

confidence: 99%

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Transduction Mechanisms, Micro-Structuring Techniques, and Applications of Electronic Skin Pressure Sensors: A Review of Recent Advances

Santos

Fortunato

Martins

et al. 2020

Sensors

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Electronic skin (e-skin), which is an electronic surrogate of human skin, aims to recreate the multifunctionality of skin by using sensing units to detect multiple stimuli, while keeping key features of skin such as low thickness, stretchability, flexibility, and conformability. One of the most important stimuli to be detected is pressure due to its relevance in a plethora of applications, from health monitoring to functional prosthesis, robotics, and human-machine-interfaces (HMI). The performance of these e-skin pressure sensors is tailored, typically through micro-structuring techniques (such as photolithography, unconventional molds, incorporation of naturally micro-structured materials, laser engraving, amongst others) to achieve high sensitivities (commonly above 1 kPa−1), which is mostly relevant for health monitoring applications, or to extend the linearity of the behavior over a larger pressure range (from few Pa to 100 kPa), an important feature for functional prosthesis. Hence, this review intends to give a generalized view over the most relevant highlights in the development and micro-structuring of e-skin pressure sensors, while contributing to update the field with the most recent research. A special emphasis is devoted to the most employed pressure transduction mechanisms, namely capacitance, piezoelectricity, piezoresistivity, and triboelectricity, as well as to materials and novel techniques more recently explored to innovate the field and bring it a step closer to general adoption by society.

show abstract

Section: Pressure Sensorsmentioning

confidence: 99%

Section: Pressure Sensorsmentioning

confidence: 99%

Section: Table A1mentioning

confidence: 99%

See 1 more Smart Citation

Transduction Mechanisms, Micro-Structuring Techniques, and Applications of Electronic Skin Pressure Sensors: A Review of Recent Advances

Santos

Fortunato

Martins

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…In the past several years, there have been many studies on flexible force sensors with great performance [ 13 , 14 ], some of which have already surpassed the sensitivities of human beings [ 15 , 16 ]. However, the detection of sliding and static friction forces has been overlooked.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics

Cao

et al. 2020

Research

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Biomimetic flexible tactile sensors endow prosthetics with the ability to manipulate objects, similar to human hands. However, it is still a great challenge to selectively respond to static and sliding friction forces, which is crucial tactile information relevant to the perception of weight and slippage during grasps. Here, inspired by the structure of fingerprints and the selective response of Ruffini endings to friction forces, we developed a biomimetic flexible capacitive sensor to selectively detect static and sliding friction forces. The sensor is designed as a novel plane-parallel capacitor, in which silver nanowire–3D polydimethylsiloxane (PDMS) electrodes are placed in a spiral configuration and set perpendicular to the substrate. Silver nanowires are uniformly distributed on the surfaces of 3D polydimethylsiloxane microcolumns, and silicon rubber (Ecoflex®) acts as the dielectric material. The capacitance of the sensor remains nearly constant under different applied normal forces but increases with the static friction force and decreases when sliding occurs. Furthermore, aiming at the slippage perception of neuroprosthetics, a custom-designed signal encoding circuit was designed to transform the capacitance signal into a bionic pulsed signal modulated by the applied sliding friction force. Test results demonstrate the great potential of the novel biomimetic flexible sensors with directional and dynamic sensitivity of haptic force for smart neuroprosthetics.

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“…In the past few years, pressure sensors are considered promising candidates for use in wearable devices, electronic skins, and human-machine interfaces due to their low cost, flexibility, simple fabrication process, high integration potential, among others [1][2][3][4] . In particular, pressure sensors are classified into four main types namely: capacitive [5][6][7] , piezoresistive [8][9][10] , piezoelectric [11][12][13] , and triboelectric sensors [14][15][16] . Furthermore, piezoresistive pressure sensors have multiple benefits, including low energy consumption, easy signal collection, simple device assembly, and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Sea Urchin-like Microstructures Pressure Sensors with Ultra-sensitivity and Super Working Range

Wang¹,

Tao²,

Yuan³

et al. 2020

Preprint

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Sensitivity and pressure range are two significant parameters of pressure sensors. The existing pressure sensors are difficult to achieve both high sensitivity and a wide pressure range. In this regard, we proposed a new pressure sensor with a ternary nanocomposite Fe2O3/C@SnO2. Notably, the sea urchin-like Fe2O3 structure promoted signal transduction and protected Fe2O3 needles from mechanical breaking; while, acetylene carbon black improved the conductivity of Fe2O3. Moreover, one part of SnO2 nanoparticles adhered to the surface of Fe2O3 needles and formed Fe2O3/SnO2 heterostructures whereas its other part of nanoparticles dispersed into the carbon layer and formed SnO2@C structures. Collectively, the synergy of the three structures (Fe2O3/C, Fe2O3/SnO2 and SnO2@C) improved the limited pressure response range of a single structure. The experimental results demonstrated that the Fe2O3/C@SnO2 pressure sensor exhibits high sensitivity (680 kPa-1), fast response (10 ms), broad range (up to 150 kPa), and good reproducibility (over 3500 cycles under a pressure of 110 kPa). This implies that the new pressure sensor has wide application prospects especially in wearable electronic devices and health monitoring.

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Graded intrafillable architecture-based iontronic pressure sensor with ultra-broad-range high sensitivity

Cited by 479 publications

References 43 publications

Transduction Mechanisms, Micro-Structuring Techniques, and Applications of Electronic Skin Pressure Sensors: A Review of Recent Advances

Transduction Mechanisms, Micro-Structuring Techniques, and Applications of Electronic Skin Pressure Sensors: A Review of Recent Advances

Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics

Sea Urchin-like Microstructures Pressure Sensors with Ultra-sensitivity and Super Working Range

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