Liquid Metal Gallium Micromachines Speed Up in Confining Channels

Wang, Dao‐Lin; Lin, Zhihua; Zhou, Chang; Gao, Changyong; He, Qiang

doi:10.1002/aisy.201970070

Cited by 10 publications

(5 citation statements)

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“…Wang et al reported a Galinstan micromotor moved at a speed of 117.2 mm/s after applying a DC electric field with a voltage of 30 V [ 41 ]. These MLMTs can adaptively and automatically deform and accelerate in narrow channels ( Figure 12 A).…”

Section: Propulsion Mechanism Of Mlmtsmentioning

confidence: 99%

“…( ii ) The relationship of the deformation degree (L/L 0 ) of MLMTs and its position in the channels. ( iii ) The instantaneous velocity of MLMTs [ 41 ]. ( B ) The schematic representation of the experimental setup and the CEW effect [ 105 ].…”

Section: Figurementioning

confidence: 99%

“…Thus, LM motors below 1 cm, named mini/micro/nano scale liquid metal motors (MLMTs) (MCLMTs for micro/nano LM motors; MILMTs for mini LM motors) will be discussed in this paper. When the size of MLMT is between 1 cm and 1 mm, it is still in a fully liquid state, so it can realize a self-deformation and adapt to its surroundings [ 41 ]. At this length scale, the movement of MLMTs requires less driving force, and the main driving force is bubbles recoil force and surface tension.…”

Section: Introductionmentioning

confidence: 99%

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Mini/Micro/Nano Scale Liquid Metal Motors

2021

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Swimming motors navigating in complex fluidic environments have received tremendous attention over the last decade. In particular, liquid metal (LM) as a new emerging material has shown considerable potential in furthering the development of swimming motors, due to their unique features such as fluidity, softness, reconfigurability, stimuli responsiveness, and good biocompatibility. LM motors can not only achieve directional motion but also deformation due to their liquid nature, thus providing new and unique capabilities to the field of swimming motors. This review aims to provide an overview of the recent advances of LM motors and compare the difference in LM macro and micromotors from fabrication, propulsion, and application. Here, LM motors below 1 cm, named mini/micro/nano scale liquid metal motors (MLMTs) will be discussed. This work will present physicochemical characteristics of LMs and summarize the state-of-the-art progress in MLMTs. Finally, future outlooks including both opportunities and challenges of mini/micro/nano scale liquid metal motors are also provided.

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Section: Propulsion Mechanism Of Mlmtsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mini/Micro/Nano Scale Liquid Metal Motors

2021

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“…However, these methods are currently hampered by quite complex manufacturing processes. Wang et al used LM gallium to move toward the negative electrode under the impetus of hydrogen bubbles . However, this method usually relies on intense chemical reactions, and bubbles inevitably affect LM droplets.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Magnetic and Electric Control of Liquid Metal Droplets

Liu

Huang

et al. 2023

Langmuir

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In the present study, we propose a magnetically controlled and electrically controlled magnetic liquid metal (MLM) method to achieve high-performance multiple manipulation of droplets. The prepared MLM has good active and passive deformability. Under the action of the magnetic field, controllable transport, splitting, merging, and rotation are realized. In addition, controllable electric field manipulation in alkaline and acidic electrolytes is realized. This simple preparation method can be applied to the precise and rapid control of the magnetic field and electric field at the same time. Compared with other droplet manipulation methods, we realized droplet manipulation independent of special surfaces. It has the advantages of easy implementation, low cost, and high controllability. It shows great application potential in the fields of biochemical analysis, microfluidics, drug transportation in complex limited space, and intelligent soft robots.

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“…Soft and stretchable electronics have received a tremendous amount of attention due to their potential for applications in the next generation of electronics such as wearable and conformal electronics, − soft robotics, , and stretchable displays. − Among various materials, liquid metals, especially gallium and its alloys, have been considered as compelling conductors and fillers due to their inherent stretchability (while maintaining metallic conductivity), low viscosity, and patternability due to the oxide layer spontaneously formed on the surface. Thus, liquid metals have been maneuvered to fabricate high-end flexible and stretchable electronic components and devices − such as stretchable antennas, − deformable electrodes, , soft sensors, − switches, , actuators, − and micromachines. − …”

Section: Introductionmentioning

confidence: 99%

2D and 3D Structuring of Freestanding Metallic Wires Enabled by Room-Temperature Welding for Soft and Stretchable Electronics

Bhuyan

Singh

Park

2021

ACS Appl. Mater. Interfaces

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In this work, a facile and cost-effective approach to assemble metallic wires into two-dimensional (2D) and three-dimensional (3D) freestanding geometries by room-temperature welding is demonstrated. The low melting point of gallium (29.8 °C) enables the welding at room temperature without the aid of high-energy sources required for high-melting-point metals and alloys. The welding enables assembly of solid gallium wires into 2D and 3D geometries that could create freestanding architectures with multiple junctions along any inclined direction. These 2D and 3D freestanding metallic structures are freeze-cast in soft elastomers to obtain stretchable and soft devices: a 2D stretchable resistive and capacitive sensor patterned with parallel metal lines, a 2D stretchable capacitive sensor patterned with an interdigitated metal structure with capacitive changes on stretching in both x- and y-axes, and a 3D compressive sensor by assembly of liquid metal helices, which could sense foot pressure compression. We also developed a facile method to interconnect between soft circuits and external electronics, suppressing stress during mechanical deformation.

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Liquid Metal Gallium Micromachines Speed Up in Confining Channels

Cited by 10 publications

References 0 publications

Mini/Micro/Nano Scale Liquid Metal Motors

Mini/Micro/Nano Scale Liquid Metal Motors

High-Performance Magnetic and Electric Control of Liquid Metal Droplets

2D and 3D Structuring of Freestanding Metallic Wires Enabled by Room-Temperature Welding for Soft and Stretchable Electronics

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