Lignin-based highly sensitive flexible pressure sensor for wearable electronics

Wang, Bingxin; Shi, Ting; Zhang, Yanru; Chen, Changzhou; Li, Qiang; Fan, Yongming

doi:10.1039/c8tc01348a

Cited by 66 publications

(42 citation statements)

References 35 publications

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“…This is because different microstructures exhibit different force–deformation behaviors specified by their geometries. For example, e‐skins integrated with micropyramid dielectric layers exhibited a significantly elevated pressure sensitivity compared to that of e‐skins without the layers . Additionally, the pressure sensitivity and detection range could be simply modulated by adjusting the areal distribution of the micropyramids.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Sun

Park

et al. 2018

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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.201803411.Low-dimensional nanomaterials are widely adopted as active sensing elements for electronic skins. When the nanomaterials are integrated with microscale architectures, the performance of the electronic skin is significantly altered. Here, it is shown that a high-performance flexible and stretchable electronic skin can be produced by incorporating a piezoresistive carbon nanotube composite into a hierarchical topography of micropillar-wrinkle hybrid architectures that mimic wrinkles and folds in human skin. Owing to the unique hierarchical topography of the hybrid architectures, the hybrid electronic skin exhibits versatile and superior sensing performance, which includes multiaxial force detection (normal, bending, and tensile stresses), remarkable sensitivity (20.9 kPa −1 , 17.7 mm −1 , and gauge factor of 707 each for normal, bending, and tensile stresses), ultrabroad sensing range (normal stress = 0-270 kPa, bending radius of curvature = 1-6.5 mm, and tensile strain = 0-50%), sensing tunability, fast response time (24 ms), and high durability (>10 000 cycles). Measurements of spatial distributions of diverse mechanical stimuli are also demonstrated with the multipixel electronic skin. The stress-strain behavior of the hybrid structure is investigated by finite element analysis to elucidate the underlying principle of the superior sensing performance of the electronic skin. Electronic Skins www.advancedsciencenews.com

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Section: Introductionmentioning

confidence: 99%

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Sun

Park

et al. 2018

Small

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“…The related linear range and sensitivity of the present sensor and other reported results are summarized in Figure 4. [3,[19][20][21][24][25][26][27]32,[39][40][41][42][43][44][45] Clearly most previously reported sensors are distributed in either low sensitivity over a wide linear range region or high sensitivity over a narrow linear range region, showing significant compromise between the sensitivity and linear range. In our case, by optimizing the mass fraction of active materials and PDMS proportion, and adopting leaf vein as spacer, high sensitivity of 1036.04 kPa −1 in a wide linear range of 23 kPa was achieved.…”

Section: Pressure Sensing Mechanismmentioning

confidence: 99%

Highly Sensitive 1T‐MoS₂ Pressure Sensor with Wide Linearity Based on Hierarchical Microstructures of Leaf Vein as Spacer

Yang

Xiang

Qin

et al. 2019

Adv Elect Materials

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Flexible pressure sensors have attracted considerable interest for their promising applications in future robotics and wearable devices. Pressure sensors with high sensitivity and a wide linear range do not require complex signal processing, and greatly enhance device miniaturization and decrease power consumption. High‐performance pressure sensors are prepared based on 1T molybdenum disulfide within polydimethylsiloxane foams (MoS2‐PDMS) as conductive active layer and with hierarchical micro‐network leaf vein as spacers. Due to the excellent electrical conductivity of 1T MoS2‐PDMS and the novel structural design, they exhibit better properties than previously reported devices, including a high sensitivity of 1036.04 kPa−1 over a wide linear range from 1 to 23 kPa, fast response time (<50 ms), ultralow detectable pressure limit of 6.2 Pa, and excellent repetitive load and unloading stability (10 000 cycles). In addition, its applications in sensing subtle pressure and non‐contact breeze and in monitoring different human motion activities and physiological signals are explored. Some new applications including water pressure testing and subtle fluctuations in water caused by small fish swimming are also investigated. The results demonstrate the tested applications of layered 2D materials in pressure sensors that can be feasibly adopted in next‐generation electronic skin and artificial intelligence.

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“… Freeze-drying 103.5 (0–0.01) 27.5 (0.01–18) 1 Pa/ 18 kPa -/- 50,000 (L) 1 V/- (♡ ) PR Y. Fan [ 282 ] 2018 Carbonized lignin@PDMS. - 57 (0–2) 500 Pa/ 130 kPa 60/40 10 5 (L) 1 V/- (♡ ) PR S. Shiratori [ 143 ] 2018 Two PDMS films micro-structured into fish-scales (0.62 µm of height), covered with PEDOT:PSS and graphene nanosheets, facing each other.…”

Section: Table A1mentioning

confidence: 99%

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.

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Lignin-based highly sensitive flexible pressure sensor for wearable electronics

Abstract: The development of flexible sensors with low cost, facile preparation and good reproducibility is of profound significance for wearable electronics and intelligent systems.

Cited by 66 publications

References 35 publications

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Highly Sensitive 1T‐MoS₂ Pressure Sensor with Wide Linearity Based on Hierarchical Microstructures of Leaf Vein as Spacer

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

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Lignin-based highly sensitive flexible pressure sensor for wearable electronics

Abstract: The development of flexible sensors with low cost, facile preparation and good reproducibility is of profound significance for wearable electronics and intelligent systems.

Cited by 66 publications

References 35 publications

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Hybrid Architectures of Heterogeneous Carbon Nanotube Composite Microstructures Enable Multiaxial Strain Perception with High Sensitivity and Ultrabroad Sensing Range

Highly Sensitive 1T‐MoS2 Pressure Sensor with Wide Linearity Based on Hierarchical Microstructures of Leaf Vein as Spacer

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

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Highly Sensitive 1T‐MoS₂ Pressure Sensor with Wide Linearity Based on Hierarchical Microstructures of Leaf Vein as Spacer