Highly Sensitive Artificial Skin Perception Enabled by a Bio-inspired Interface

Lü, Chao; Chen, Xi; Zhang, Xiaohong

doi:10.1021/acssensors.2c02743

Cited by 15 publications

(4 citation statements)

References 32 publications

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“…Zhang et al fabricated a flexible tactile sensor that has a robust metal–polymer interface designed through the seed-growth strategy. 59 The authors seeded precursors containing metal ions into a polyelectrolyte soil and then a tree-root-like interface was formed based on a chemical reduction process (Fig. 3(b)).…”

Section: Inspiration From Organismsmentioning

confidence: 99%

The role of bio-inspired micro-/nano-structures in flexible tactile sensors

Fu,

Xu,

Fan

et al. 2024

J. Mater. Chem. C

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Section: Inspiration From Organismsmentioning

confidence: 99%

The role of bio-inspired micro-/nano-structures in flexible tactile sensors

Fu,

Xu,

Fan

et al. 2024

J. Mater. Chem. C

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“…The other application form of IPMCs is piezoionic strain sensors, which can output electrical signals based on a piezoionic sensing mechanism . Typically, if IPMC sensors deform under external strain and stress, one side is tensile, while the other becomes compressed.…”

Section: Flexible and Smart Ipmc Devices For Practical Applicationsmentioning

confidence: 99%

“…The other application form of IPMCs is piezoionic strain sensors, which can output electrical signals based on a piezoionic sensing mechanism. 39 Typically, if IPMC sensors deform under external strain and stress, one side is tensile, while the other becomes compressed. Then, gradient stress forms inside sensors and causes the migration of mobile ions from compressed regions to the tensile regions.…”

Section: Piezoionic Strain Sensors For Smart and Wearable Applicationsmentioning

confidence: 99%

Ionic Polymer–Metal Composites: From Material Engineering to Flexible Applications

Lu,

Zhang

2023

Acc. Chem. Res.

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Metrics & MoreArticle Recommendations CONSPECTUS: Ionic polymer−metal composites (IPMCs) are one kind of artificial muscles that can realize energy conversions in response to external stimulus with merits of lightweight, scalability, quick response, and flexibility and have been treated as an important platform in artificial intelligence, such as bionic robotics, smart sensors, and micro-electromechanical systems. It is wellknown that IPMC devices are mainly composed of one electrolyte layer laminated with symmetric electrode layers and realize energy conversion based on ion migration and redistribution inside the devices. However, several critical issues have greatly impeded the practical applications of IPMC devices, including metal electrode cracks, metal−polymer interface detachment, and water loss in the electrolyte. In the past decade, our group and collaborators have made attempts to address the mentioned critical issues with the purpose of accelerating practical applications of IPMC devices. First, in order to address the metal electrode cracks, we have developed various electrode materials to replace the metal electrode material, such as black phosphorus and graphdiyne. These materials display superior electrical and mechanical properties with enhanced material stability without cracking. Second, to address metal−polymer interface detachment, we have designed robust interfaces for IMPC devices with vertical array structures. The asprepared interfaces present high ionic conductivity with excellent mechanical stability under bending states. As a result, the IPMC devices deliver high working stability exceeding a million cycles under air conditions. Third, in order to avoid water loss in the electrolyte, especially at ambient conditions, we have developed ionogel electrolytes containing highly stable ionic liquids as active ion sources. The ionogel electrolytes effectively prevent water loss in conventional water-containing electrolytes, just like Nafion electrolytes and greatly improve the working stability of IPMC devices. After addressing the key issues of IPMC devices, we finally obtained many high-performing IPMC devices and explored various intelligent applications of them. For instance, we have demonstrated the smart functions of IPMC devices as sensitive strain sensors, such as sign language recognition, handwriting detection, and human muscle monitoring. In addition, we have developed bionic flying robots with a vibration frequency as high as 30 Hz with the aid of high-performance IPMC actuators. A medical catheter based on IPMC actuators has been put forward by our group and can realize multiple degrees of freedom deformation under a low driving voltage of 2.5 V, which presents great potential for application in medical instruments. Lastly, a perspective on critical challenges and future research directions on IPMC materials and devices is highlighted for accelerating practical application.

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“…Moreover, some piezo‐ionic sensors are limited by weak material interfaces based on physical adhesion, and the sensors may become ineffective after multiple cycles of use. [ 33,34 ] Currently, most of the soft tactile sensors, made of such as hydrogel, [ 35 ] sponge, [ 36 ] and HM‐SPS [ 37 ] cannot provide the pressing position information. Thus, it is greatly needed to develop a soft tactile sensor that can sense the pressing position.…”

Section: Introductionmentioning

confidence: 99%

Self‐Powered Underwater Pressing and Position Sensing and Autonomous Object Grasping with a Porous Thermoplastic Polyurethane Film Sensor

Wang,

Song,

Liu

et al. 2024

Adv Funct Materials

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Most flexible ionic tactile sensors can hardly be used in deep sea due to their poor antiswelling and anticompression properties under high hydrostatic pressure. To achieve pressure and position sensing under high hydrostatic pressure, a self‐powered underwater tactile sensor made of a porous thermoplastic polyurethane (TPU) film is presented in this paper. The sensor works by generating an electric current due to the different moving velocities of ions in the porous film under pressing. Experimental results show that the magnitude of the generated current signal increases with the applied pressure, the contacting area, and ion concentration of the solution. The direction and magnitude of the current signal depend on the pressing position of the film. The signal magnitude decreased with the closer to the center of the film. The maximum pressure sensitivity and positioning resolution are 0.62 kPa−1 and 1.31 mm respectively. Response time (0.19 s), 0.67 s recovery time, and 50–600 kPa pressure detection range are achieved. In addition, the signal magnitude is decreased only by 15.53% when the sensor is placed underwater at a simulated depth of 100 m. Proof of concept demonstration of underwater autonomously grasping objects of different weights with this sensor is successfully achieved.

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Highly Sensitive Artificial Skin Perception Enabled by a Bio-inspired Interface

Cited by 15 publications

References 32 publications

The role of bio-inspired micro-/nano-structures in flexible tactile sensors

The role of bio-inspired micro-/nano-structures in flexible tactile sensors

Ionic Polymer–Metal Composites: From Material Engineering to Flexible Applications

Self‐Powered Underwater Pressing and Position Sensing and Autonomous Object Grasping with a Porous Thermoplastic Polyurethane Film Sensor

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