Flexible Normal‐Tangential Force Sensor with Opposite Resistance Responding for Highly Sensitive Artificial Skin

Mu, Chunlai; Song, Ye; Huang, Wen; Ran, Ao; Sun, Rujie; Xie, Weihua; Zhang, Huaiwu

doi:10.1002/adfm.201707503

Cited by 177 publications

(128 citation statements)

References 65 publications

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“…The measurement of these is important in order to realize the tactile sensing of human activities or motions. To demonstrate electronic skin with the capabilities of human‐skin‐like tactile sensing, many researchers have studied novel materials with improved sensing performance, including carbon nanotubes, flexible elastomers, conducting polymers, ionic gels, nanowires or materials with the structure of nanoneedles, hemispheres, and pyramids . However, most of the previous studies have focused on the capability to perceive only a single type of mechanical stimulus, rendering previous attempts at designing an electronic skin incapable of sensing multiple forms of mechanical loads.…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Tactile Sensor Using a Pyramid‐Plug Structure for Detecting Pressure, Shear Force, and Torsion

Choi

Jang

Kim

et al. 2018

Adv Materials Technologies

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through the discrimination of multiple mechanical stimuli. [3] Therefore, the ideal artificial electronic skin can discriminate external loads from various types of input and can also detect intensity.Furthermore, the electronic skin must have properties that satisfy corresponding requirements for tactile sensing. For example, there are several relevant para meters that electronic skin sensors must measure, such as sensitivity, working range, detection time, and hysteresis. The measurement of these is important in order to realize the tactile sensing of human activities or motions. To demon strate electronic skin with the capabili ties of humanskinlike tactile sensing, many researchers have studied novel materials with improved sensing perfor mance, including carbon nanotubes, [6][7][8][9][10][11][12] flexible elastomers, [3,4,6,[13][14][15][16][17] conducting polymers, [14,18,19] ionic gels, [5,7,[20][21][22][23] nanowires [24] or materials with the structure of nanoneedles, [25] hemispheres, [3,5,26,27] and pyramids. [10,14,[28][29][30][31] However, most of the previous studies have focused on the capability to perceive only a single type of mechanical stimulus, rendering previous attempts at designing an electronic skin incapable of sensing multiple forms of mechanical loads.Previous studies have reported sensors with different mate rials and structural approaches for the detection and discrimi nation of the perception of multiple mechanical stimuli. Yin et al. developed the fiber strain sensor for tensile, bending, and torsionsensitive properties using graphenebased composite fiber. [32] In the present study, a fiber strain sensor was fabri cated in a compression spring structure through a facile solu tion process with high reproducibility. Pang et al. presented an interlockingbased straingauge sensor for detecting multiple mechanical forces (including normal, tangential, and torsional forces) using Ptcoated microhair arrays. [33] This strain sensor allowed for a simple and robust sensing platform using the interlocking structure for largearea sensing. Despite the poten tial of devices such as these, the sensors presented in previous reports exhibited low sensitivity for the perception of external mechanical stimuli in a low sensing range with only small elec trical signal differences. They could also only detect a limited range of mechanical loadings.To improve the performance of tactile sensors, a new tac tile sensor should be designed by taking different approaches than the traditional approaches. In this study, we fabricated a tactile sensor composed of an ionic gel inspired by the ionic Sensors that detect and discriminate external mechanical forces are a principal component in the development of electronic tactile systems that can mimic the multifunctional properties of human skin. This study demonstrates a pyramid-plug structure for highly sensitive tactile sensors that enables them to detect pressure, shear force, and torsion. The device is composed of pyramidpatterned ionic gel inspired by neural mec...

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Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Tactile Sensor Using a Pyramid‐Plug Structure for Detecting Pressure, Shear Force, and Torsion

Choi

Jang

Kim

et al. 2018

Adv Materials Technologies

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“…Such behavior can be found inherently in many synthetic materials which are thus used in the fabrication of electronic sensors . Alternative mechanisms have also been developed, such as the use of capacitive sensors in pressure sensing or the use of nanostructures and soft materials . In artificial skin devices, these sensors have to be then incorporated into arrays to mimic spatial recognition .…”

Section: Replicating Properties Of Skinmentioning

confidence: 99%

“…[107] Alternative mechanisms have also been developed, such as the use of capacitive sensors in pressure sensing or the use of nanostructures and soft materials. [108][109][110][111][112][113] In artificial skin devices, these sensors have to be then incorporated into arrays to mimic spatial recognition. [114] Conventional silicon processing technologies have to be modified to suit flexible substrates, which results in a limiting of device performance.…”

Section: Skin As a Sensormentioning

confidence: 99%

Using Artificial Skin Devices as Skin Replacements: Insights into Superficial Treatment

Low

Liu

Owh

et al. 2019

Small

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Artificial skin devices are able to mimic the flexibility and sensory perception abilities of the skin. They have thus garnered attention in the biomedical field as potential skin replacements. This Review delves into issues pertaining to these skin‐deep devices. It first elaborates on the roles that these devices have to fulfill as skin replacements, and identify strategies that are used to achieve such functionality. Following which, a comparison is done between the current state of these skin‐deep devices and that of natural skin. Finally, an outlook on artificial skin devices is presented, which discusses how complementary technologies can create skin enhancements, and what challenges face such devices.

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“…Good biocompatibility allows it to be applied to the human body without adverse reactions. Its heat–and–cold resistance, water resistance and chemical stability enable it to maintain stable performance during long–term use in harsh environmental conditions …”

Section: Introductionmentioning

confidence: 99%

A High Stretchable and Self–Healing Silicone Rubber with Double Reversible Bonds

et al. 2019

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It is a challenge to synthesize silicone rubber with high stretchability and rapid self-healing ability without external stimuli. This article reports on a new class of self-healing poly (dimethylsiloxane)(PDMS) elastomer fabricated by introducing double reversible bonds (imine and hydrogen bonds) into silicone chains. Through reasonable structural design, the silicone rubber with high-efficiency self-healing ability was produced. The as-prepared PDMS elastomer films exhibited high stretchability (> 4000%), good transparency (> 80%) and fast self-healing efficiency (3 h at room temperature a healing efficiency of 93%). It could also be healed at low temperature (-20°C) and processed cyclically. In addition, we combined carbon nanotube films with this elastomer to prepare a flexible and stretchable capacitive sensor through a simple process.

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Flexible Normal‐Tangential Force Sensor with Opposite Resistance Responding for Highly Sensitive Artificial Skin

Cited by 177 publications

References 65 publications

A Highly Sensitive Tactile Sensor Using a Pyramid‐Plug Structure for Detecting Pressure, Shear Force, and Torsion

A Highly Sensitive Tactile Sensor Using a Pyramid‐Plug Structure for Detecting Pressure, Shear Force, and Torsion

Using Artificial Skin Devices as Skin Replacements: Insights into Superficial Treatment

A High Stretchable and Self–Healing Silicone Rubber with Double Reversible Bonds

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