Three-Dimensional Printed Wearable Sensors with Liquid Metals for Detecting the Pose of Snakelike Soft Robots

Zhou, Luqian; Gao, Qing; Zhan, Jun-Fu; Xie, Chaoqi; Fu, Jianzhong; He, Yong

doi:10.1021/acsami.8b06903

Cited by 128 publications

(99 citation statements)

References 45 publications

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“…Flexible electronics show their most promising applications in wearable devices and health monitoring. These wearable electronics are able to conduct continuous physiological monitoring and therapy via real‐time detections and measurements of body motion, blood pressure, heart rate and so on . Distinguished from the other kinds of LM‐based sensor, the sensors for wearable devices require much higher sensitivity for resolving the small pressure changes, such as skin‐based heart rate monitoring of human.…”

Section: Applications Of Liquid Metal–based Microfluidic Systemsmentioning

confidence: 99%

Liquid Metal–Based Soft Microfluidics

Zhu

Wang

Handschuh‐Wang

et al. 2019

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Motivated by the increasing demand of wearable and soft electronics, liquid metal (LM)‐based microfluidics has been subjected to tremendous development in the past decade, especially in electronics, robotics, and related fields, due to the unique advantages of LMs that combines the conductivity and deformability all‐in‐one. LMs can be integrated as the core component into microfluidic systems in the form of either droplets/marbles or composites embedded by polymer materials with isotropic and anisotropic distribution. The LM microfluidic systems are found to have broad applications in deformable antennas, soft diodes, biomedical sensing chips, transient circuits, mechanically adaptive materials, etc. Herein, the recent progress in the development of LM‐based microfluidics and their potential applications are summarized. The current challenges toward industrial applications and future research orientation of this field are also summarized and discussed.

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Section: Applications Of Liquid Metal–based Microfluidic Systemsmentioning

confidence: 99%

Liquid Metal–Based Soft Microfluidics

Zhu

Wang

Handschuh‐Wang

et al. 2019

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171

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“…[81] More recently,3 Dp rinting (DIW) has been employed to simplify the manufacturing process while introducing complex sensing modes. [82][83][84] By using am ultimaterial embedded 3D printing method (e-3DP), where conductive inks and supporting reservoirs are directly extruded and patterned in as lowly curing elastomeric matrix, Lewis et al were able to create resistive and capacitive sensors with programmable,a rbitrary geometries (Figure 2a). [85,86] Optical or optoelectronic sensing is based on measuring the variations in light (most commonly,variations in the light intensity) in alight-transmitting medium.…”

Section: Soft Sensing Materialsmentioning

confidence: 99%

Bio‐inspired Design and Additive Manufacturing of Soft Materials, Machines, Robots, and Haptic Interfaces

et al. 2019

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Soft materials possess several distinctive characteristics, such as controllable deformation, infinite degrees of freedom, and self‐assembly, which make them promising candidates for building soft machines, robots, and haptic interfaces. In this Review, we give an overview of recent advances in these areas, with an emphasis on two specific topics: bio‐inspired design and additive manufacturing. Biology is an abundant source of inspiration for functional materials and systems that mimic the function or mechanism of biological tissues, agents, and behaviors. Additive manufacturing has enabled the fabrication of materials and structures prevalent in biology, thereby leading to more‐capable soft robots and machines. We believe that bio‐inspired design and additive manufacturing have been, and will continue to be, important tools for the design of soft robots.

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“…By rotating and moving the microtube, a helical LM line was formed on the inner wall (Movie S4, Supporting Information). The consumption of LM was significantly reduced compared with that by filling the whole microchannel with LM, and the leakage of LM was also prevented without additional encapsulation step. Figure B,C is the photographs of the microtube (20 cm long, screw pitch: ≈4 mm).…”

Section: Resultsmentioning

confidence: 99%

A Versatile Approach for Direct Patterning of Liquid Metal Using Magnetic Field

Chi

et al. 2019

Adv Funct Materials

155

130

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Patterning of liquid metal (LM) is usually an integral step toward its practical applications. However, the high surface tension along with surface oxide makes direct patterning of LM very challenging. Existing LM patterning techniques are designed for limited types of planar substrates, which require multiple-step operation, delicate molds and masks, and expensive equipment. In this work, a simple, versatile, and equipment-free approach for direct patterning of LM on various substrates using magnetic field is reported. To achieve this, magnetic microparticles are dispersed into LM by stirring. When a moving magnetic field is applied to the LM droplet, the aggregated magnetic microparticles deform the droplet to a continuous line. In addition, this approach is also applicable to supermetallophobic substrates since the applied magnetic field significantly enhances the contact between LM and substrate. Moreover, remote manipulation of the magnetic microparticles allows direct patterning of LM on nonplanar surfaces, even in a narrow and near closed space, which is impossible for the existing techniques. A few applications are also demonstrated using the proposed technique for flexible electronics and wearable sensors.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201901370. used for the other liquids. Therefore, it is challenging to directly pattern LM using some well-established printing strategies such as inkjet or screen printing.Various LM patterning techniques have been developed in the past few years based on microfluidic injection, [11] selective wetting, [2d,12] LM suspensions printing, [13] stencil lithography, [14] reductive printing, [15] imprint lithography, [16] selective mechanical sintering, [17] laser patterning, [18] microcontact printing, [19] and three-dimensional (3D) printing. [20] However, the reported techniques involved multiple-step operation, additional pretreatment of substrate, post sintering, delicate molds and masks, tedious microfabrication process, as well as sophisticated equipment. These not only complicated the fabrication but also increased the cost. Besides, each of these reported techniques was designed for a specific substrate, which limited the widespread applications of LM. Due to low adhesion, it is rather difficult to directly pattern LM or transfer the existing LM patterns onto supermetallophobic substrates, on which the contact angle of an LM droplet exceed 150°. In addition, most existing patterning techniques were limited to planar substrates. 3D patterning of LM remains rather challenging, which involved sophisticated facilities (e.g., pressure pump, translation stage) and additional encapsulation and fixation steps for practical applications. [20a] Thus, developing a simple, versatile, and equipment-free LM patterning technique for various planar and nonplanar substrates is highly desired to broaden the applications of LM.It has been reported that magnetic actuation can be used for LM manipu...

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Three-Dimensional Printed Wearable Sensors with Liquid Metals for Detecting the Pose of Snakelike Soft Robots

Cited by 128 publications

References 45 publications

Liquid Metal–Based Soft Microfluidics

Liquid Metal–Based Soft Microfluidics

Bio‐inspired Design and Additive Manufacturing of Soft Materials, Machines, Robots, and Haptic Interfaces

A Versatile Approach for Direct Patterning of Liquid Metal Using Magnetic Field

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