Flexible Highly Sensitive Pressure Sensor Based on Ionic Liquid Gel Film

Zhang, Shaohui; Wang, Fengxia; Peng, Huan; Yan, Jinghui; Pan, Ge‐Bo

doi:10.1021/acsomega.7b01575

Cited by 72 publications

(62 citation statements)

References 51 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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“…The use of conductive gels, namely, ionogels and hydrogels, has been largely applied to address the issue. Ionic liquids, or ionogels, are salts with low vapor pressure displaying high ionic conductivity . Ionogels have been used as gate dielectrics in graphene‐based thin film transistors operating at high frequencies .…”

Section: D Graphene For Advanced Electronicsmentioning

confidence: 99%

3D Assembly of Graphene Nanomaterials for Advanced Electronics

Ferrand

Chabi

Agarwala

2020

Advanced Intelligent Systems

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Since the discovery of electricity and the creation of the first transistors two centuries ago, the field of electronics has evolved rapidly to become omnipresent. Today, electronic devices are challenged by new demands in function and performance: they are expected to be lightweight, highly efficient, flexible, smart, implantable, and so on. To meet these demands, the materials and components in devices need to be carefully selected and assembled together. In this regard, the controlled assembly of 3D graphene structures holds tremendous potential to achieve such levels of multifunctionality and outstanding properties. Advanced processing approaches, such as 3D printing, allow the fabrication of a variety of 3D graphene–based materials that present outstanding properties and a high degree of multifunctionality. Herein, the recent progress in the fabrication of graphene‐based devices for advanced electronics using controlled assembly is reported. The benefits of controlling the microstructure of graphene nanomaterials for enhanced properties and functionalities are highlighted, and the various fabrication methods and their implications on the organization of materials are reviewed, as well as selected electrical devices. The approaches described here are opening up new avenues for the fabrication of health or structural monitoring devices, autonomous machines, and interconnected objects.

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“…This group, in particular, has utilized hydrogel as an ionic sensory matrix to monitor the mechanical deformations similar to human skin. Thereafter, many researchers have attempted to use various ionic materials including ILs, ionic gels/polymers, and hydrogels to develop the ITS with human skin‐like perceptive characteristics and have tried to fabricate multimodal ITS . These ITS could successfully perceive multiple external stimuli such as normal pressures, shear forces, and torsional forces.…”

Section: Introductionmentioning

confidence: 99%

Ionic Tactile Sensors for Emerging Human‐Interactive Technologies: A Review of Recent Progress

Amoli

Kim

et al. 2019

Adv Funct Materials

153

119

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Ionic tactile sensors (ITS) represent a new class of deformable sensory platforms that mimic not only the tactile functions and topological structures but also the mechanotransduction mechanism across the biological ion channels in human skin, which can demonstrate a more advanced biological interface for targeting emerging human-interactive technologies compared to conventional e-skin devices. Recently, flexible and even stretchable ITS have been developed using novel structural designs and strategies in materials and devices. These skin-like tactile sensors can effectively sense pressure, strain, shear, torsion, and other external stimuli with high sensitivity, high reliability, and rapid response beyond those of human perception. In this review, the recent developments of the ITS based on the novel concepts, structural designs, and strategies in materials innovation are entirely highlighted. In particular, biomimetic approaches have led to the development of the ITS that extend beyond the tactile sensory capabilities of human skin such as sensitivity, pressure detection range, and multimodality. Furthermore, the recent progress in self-powered and self-healable ITS, which should be strongly required to allow human-interactive artificial sensory platforms is reviewed. The applications of ITS in human-interactive technologies including artificial skin, wearable medical devices, and user-interactive interfaces are highlighted. Last, perspectives on the current challenges and the future directions of this field are presented.

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Flexible Highly Sensitive Pressure Sensor Based on Ionic Liquid Gel Film

Cited by 72 publications

References 51 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

3D Assembly of Graphene Nanomaterials for Advanced Electronics

Ionic Tactile Sensors for Emerging Human‐Interactive Technologies: A Review of Recent Progress

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