Pressure Sensors: Highly Uniform and Low Hysteresis Piezoresistive Pressure Sensors Based on Chemical Grafting of Polypyrrole on Elastomer Template with Uniform Pore Size (Small 33/2019)

Oh, Jinwon; Kim, Jin‐Oh; Kim, Yunjoo; Choi, Han Byul; Yang, Jun; Lee, Serin; Pyatykh, Mikhail; Kim, Jung; Sim, Joo Yong; Park, Steve

doi:10.1002/smll.201970172

Cited by 21 publications

(1 citation statement)

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“…Figure b shows the SEM images of the top surface of the composite before and after the cyclic loading test, where no noticeable change of the contact surface is observed. Notably, our sensor exhibits much superior durability than the state-of-the-art tactile sensors owing to the mesh layer, ,,,− which serves as a support beam (Figure c).…”

Section: Results and Discussionmentioning

confidence: 99%

Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers

Bae

Jeong

Choi

et al. 2021

ACS Appl. Mater. Interfaces

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Tactile sensor arrays have attracted considerable attention for their use in diverse applications, such as advanced robotics and interactive human–machine interfaces. However, conventional tactile sensor arrays suffer from electrical crosstalk caused by current leakages between the tactile cells. The approaches that have been proposed thus far to overcome this issue require complex rectifier circuits or a serial fabrication process. This article reports a flexible tactile sensor array fabricated through a batch process using a mesh. A carbon nanotube–polydimethylsiloxane composite is used to form an array of sensing cells in the mesh through a simple “dip-coating” process and is cured into a concave shape. The contact area between the electrode and the composite changes significantly under pressure, resulting in an excellent sensitivity (5.61 kPa–1) over a wide range of pressure up to 600 kPa. The mesh separates the composite into the arranged sensing cells to prevent the electrical connection between adjacent cells and simultaneously connects each cell mechanically. Additionally, the sensor shows superior durability compared with previously reported tactile sensors because the mesh acts as a support beam. Furthermore, the tactile sensor array is successfully utilized as a Braille reader via information processing based on machine learning.

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Section: Results and Discussionmentioning

confidence: 99%

Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers

Bae

Jeong

Choi

et al. 2021

ACS Appl. Mater. Interfaces

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Low‐Cost, Highly Sensitive, and Flexible Piezoresistive Pressure Sensor Characterized by Low‐Temperature Interfacial Polymerization of Polypyrrole on Latex Sponge

Cheng

Wang

Tan

et al. 2021

Macro Materials & Eng

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Piezoresistive pressure sensors based on sponge are widely concerned because of their wide strain range, convenient signal acquisition, and good compressibility, yet it is still a challenge to acquire sponge‐based pressure sensors with low cost and excellent sensing performance. Herein, low‐priced FeCl3.6H2O and pyrrole (Py) are dispersed in deionized water to form FeCl3.6H2O/Py solution. Commercial latex sponge is impregnated into this solution to prepare conductive polypyrrole/latex (PPy/latex) sponge through low‐temperature interfacial polymerization. The surface of latex sponge is covered by the micro‐wrinkled PPy, which endows the PPy/latex sponge with a certain electrical conductivity. The specific porous structure and high elasticity of the latex sponge are the basic conditions for PPy/latex sponge excellent piezoresistive behaviors. PPy/latex sponge based piezoresistive pressure sensor shows high sensitivity (0.084 kPa−1 at below 3.12 kPa), wider sensing range (0–85.0%) and long durability over 3800 s (1800 cycles). At the same time, the ability of the PPy/latex sponge based piezoresistive pressure sensor to monitor human movement has been successfully evaluated in some application scenarios, such as bending fingers, grabbing objects, tiptoe rising, and crouching.

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Review of MXene-based Resistance Pressure Sensors for Vital Signs Monitor

Vijayababu

Krishnamoorthi

2022

J. Electron. Mater.

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Pressure Sensors: Highly Uniform and Low Hysteresis Piezoresistive Pressure Sensors Based on Chemical Grafting of Polypyrrole on Elastomer Template with Uniform Pore Size (Small 33/2019)

Cited by 21 publications

References 0 publications

Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers

Large-Area, Crosstalk-Free, Flexible Tactile Sensor Matrix Pixelated by Mesh Layers

Low‐Cost, Highly Sensitive, and Flexible Piezoresistive Pressure Sensor Characterized by Low‐Temperature Interfacial Polymerization of Polypyrrole on Latex Sponge

Review of MXene-based Resistance Pressure Sensors for Vital Signs Monitor

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