3D Multiscale Gradient Pores Impregnated with Ag Nanowires for Simultaneous Pressure and Bending Detection with Enhanced Linear Sensitivity

Sharma, Vivek; Kim, Kyeong Nam; Han, Gi Hyeon; Gwak, Eun‐Ji; Woo, Jeong-Hyun; Kang, Sung Bum; Choi, Kyoung Jin; Kim, Ju‐Young; Baik, Jeong Min

doi:10.1002/admt.201901041

Cited by 6 publications

(5 citation statements)

References 42 publications

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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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“…Most previous studies have focused only on the sensitivity or limit of pressure detection or other indicators, 111 yet few people can sense multifunctional microforces in a simple structure, such as sound, touch, and motion recognition. Therefore, Gao et al 110 developed a flexible multifunctional piezoresistive pressure sensor through designed channel limiting effects and compressible laminated MXene (Ti 3 C 2 T x ).…”

Section: ■ Triple-modal Flexible Sensorsmentioning

confidence: 99%

“…Therefore, scholars have studied other types of triple-modal sensors in addition to the common force-temperature-humidity sensors. These include force-other, − temperature-other, , force-temperature-other, ,,,− and so on, which enrich the research on multimodal sensors.…”

Section: Triple-modal Flexible Sensorsmentioning

confidence: 99%

Research Progress and Application of Multimodal Flexible Sensors for Electronic Skin

He,

Xu,

Xiao

et al. 2024

ACS Sens.

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In recent years, wearable electronic skin has garnered significant attention due to its broad range of applications in various fields, including personal health monitoring, human motion perception, human− computer interaction, and flexible display. The flexible multimodal sensor, as the core component of electronic skin, can mimic the multistimulus sensing ability of human skin, which is highly significant for the development of the next generation of electronic devices. This paper provides a summary of the latest advancements in multimodal sensors that possess two or more response capabilities (such as force, temperature, humidity, etc.) simultaneously. It explores the relationship between materials and multiple sensing capabilities, focusing on both active materials that are the same and different. The paper also discusses the preparation methods, device structures, and sensing properties of these sensors. Furthermore, it introduces the applications of multimodal sensors in human motion and health monitoring, as well as intelligent robots. Finally, the current limitations and future challenges of multimodal sensors will be presented.

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“…When the sensor is subjected to force, it will deform, which leads to the increase of contact area between ITO-PET electrode and dielectric layer, and the decrease of relative distance between two ITO-PET electrodes, which makes the capacitance of the sensor increase. Sharma et al [19] developed a stretchable multifunctional sensor composed of stretchable porous membrane with multi-scale arranged pores and silver nanowire electrodes. The sensor has different pore sizes and gradient arrangement in the film, which makes it possible to detect bending degree and pressure at the same time, and shows high linear sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Flexible pressure sensor constructed by polyurethane composite conductive sponge

Dong,

Li,

Zhou

et al. 2024

Mater. Res. Express

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As the main core component of wearable devices, flexible strain sensors have broad application prospects in health monitoring, motion monitoring, human-machine interface, rehabilitation, entertainment technology and other fields. In this paper, a rectangular sandwich resistive pressure sensor is constructed with porous conductive sponge, and its working mechanism is analyzed. The linearity of the sensor is improved and the stress range is increased by gel modification. Through experimental tests, it can withstand more than 80% compressive strain, and shows a sensitivity of 0.398 kPa-1 in the range of 6~11 kPa; the maximum range is close to 40 kPa, and the minimum detection limit is 20 Pa; under constant loading/releasing speed, the response/recovery time is about 133/150 ms; it also shows good linearity and stability. With the help of a single sensor entity, Morse code can be sent, and some human activity signals can be measured, such as speech recognition, weighing measurement, limb movement; and 8 sensors create an interesting smart insole for gait recognition. The results show that piezoresistive sensors with porous composite materials have broad application prospects in motion monitoring and human-computer interaction.

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3D Multiscale Gradient Pores Impregnated with Ag Nanowires for Simultaneous Pressure and Bending Detection with Enhanced Linear Sensitivity

Cited by 6 publications

References 42 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

Research Progress and Application of Multimodal Flexible Sensors for Electronic Skin

Flexible pressure sensor constructed by polyurethane composite conductive sponge

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