Three-Dimensional, High-Resolution Printing of Carbon Nanotube/Liquid Metal Composites with Mechanical and Electrical Reinforcement

Park, Young Geun; Min, Hyegi; Kim, Hyobeom; Zhexembekova, Anar; Lee, Chang Young

doi:10.1021/acs.nanolett.9b00150

Cited by 143 publications

(172 citation statements)

References 26 publications

Supporting

Mentioning

169

Contrasting

Order By: Relevance

“…The magnetization‐enabled high rheological property of our FM‐LMP could effectively prevent phase separation and guarantee microstructural uniformity (see SEM images in Figure 2b). It is entirely different from that of the previously reported other LM composites, which must be heavily oxidized (such as carbon nanotube filled into the LM [ 21 ] ) or alloyed (such as Cu‐Ga alloying [ 22 ] ) to increase its rheological and keep the stable suspension of microparticles. Both energy dispersive spectrometer (EDS) mapping (Figure 2c) and X‐ray diffraction (XRD) data (Figure 2d) have demonstrated that there was no observation of alloying between NdFeB microparticles and the Ga‐based LM matrix.…”

Section: Figurecontrasting

confidence: 71%

Ferromagnetic Liquid Metal Putty‐Like Material with Transformed Shape and Reconfigurable Polarity

Cao

Xia

et al. 2020

Advanced Materials

View full text Add to dashboard Cite

by both the magnetic filler and the matrix. The liquid-like ferrofluids with transformed shape easily lose magnetization once the applied magnetic field is removed, and the solid ferromagnetic materials are hard to be reconfigured as needed.Recently, a reversible paramagnetic-toferromagnetic transformation of ferrofluid droplets by the jamming of a monolayer of magnetic nanoparticles assembled at the water-oil interface was developed. [8] However, this well-designed framework is applicable only within the liquid system. The elastic matrix-based AMC could achieve a limited reconfigurable shape, while the dynamically programmed and reversible magnetic reconfiguration meets a huge challenge. [9] In addition, there is an inevitable mismatch between the electrical and ferromagnetic performances for most AMC materials due to the insulative matrix. It is naturally desirable to design a reconfigurable ferromagnetic material with high electrical conductivity and transformed shape, attracting massive attention due to the promising applications in many fields such as flexible electronics and soft robotics.Here, we present a novel reconfigurable ferromagnetic liquid metal putty-like material (FM-LMP) with high electrical conductivity, prepared by homogenously mixing the room temperature LM of EGaIn (the melting point of 15.7 °C) and ferromagnetic neodymium-iron-boron (NdFeB) microparticles, as illustrated schematically in Figure 1a. The NdFeB microparticles dispersed in the LM matrix were then magnetically saturated through a strong impulse of the magnetic field. It is surprising to find that the magnetization could turn the liquid-like suspension into the solid-like putty-like material. The FM-LMP is thus easily remodeled like modelling clay to various magnet shapes. The macroscopic magnetic performance of the FM-LMP stems from the magnetic orientation alignment of the magnetized NdFeB microparticles immersed in the LM matrix, as illustrated in Figure 1b. The magnetic polarity alignment of magnetized microparticles with high mobility when suspended in the LM matrix could be reversibly disordered and rearranged to enable FM-LMP exhibit macro scopical demagnetization and magnetization. The magnetic LM [10] has been recently proposed through mixing soft magnetic materials (such as pure iron or It is remarkably desirable and challenging to design reconfigurable ferromagnetic materials with high electrical conductivity. This has attracted great attention due to promising applications in many fields such as emerging flexible electronics and soft robotics. However, the shape and magnetic polarity of existing ferromagnetic materials with low conductivity are both hard to be reconfigured, and the magnetization of insulative ferrofluids is easily lost once the external magnetic field is removed. A novel reconfigurable ferromagnetic liquid metal (LM) puttylike material (FM-LMP) with high electrical conductivity and transformed shape, which is prepared through homogenously mixing neodymiumiron-boron microparticles into the gallium-base...

show abstract

Section: Figurecontrasting

confidence: 71%

Ferromagnetic Liquid Metal Putty‐Like Material with Transformed Shape and Reconfigurable Polarity

Cao

Xia

et al. 2020

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Inclusions of carbon nanotubes (CNT) can provide enhanced stability to printed structures, enabling printing connections between gaps and spanning changes in height. [74] The high surface energy of gallium alloys makes it difficult to disperse other materials within the bulk, and this is particularly true when trying to disperse carbon nanotubes into the alloy. The phases are not miscible and carbon nanotubes tend to cluster on the surface of the liquid metal.…”

Section: Rheological Modificationmentioning

confidence: 99%

Section: Rheological Modificationmentioning

confidence: 99%

Liquid Metal Direct Write and 3D Printing: A Review

Neumann

Dickey

2020

Adv Materials Technologies

213

170

View full text Add to dashboard Cite

This review discusses methods, challenges, and opportunities for direct‐write and 3D printing of low melting point, gallium‐based liquid metal alloys at room temperature. Alloys of gallium exhibit high conductivity and high stretchability making them well suited for use in soft circuitry for stretchable electronics and soft robotics. In addition, the liquid nature of the metal enables entirely new ways to pattern metals at room temperature; herein, the focus is placed on additive printing via nozzle‐based methods. Room temperature printing of liquid metals enables rapid fabrication of complex geometries (with dimensions as small as 10 µm) on a wide range of materials, such as polymers. These processes can be used to make metallic conductors for devices with self‐healing capabilities, soft/stretchable electrodes, and sensors.

show abstract

“…Several studies report on extrusion-based techniques for fabrication of 3D printed liquid metal structures. [49,50] Initially developed as a two-dimensional printing method, electrohydrodynamic printing (EHDP) has now been evolving to a 3D additive manufacturing process. EHDP, sometimes called as electrohydrodynamic jet printing or e-jet printing, Figure 3.…”

Section: Conductive Materials and Cell Casingmentioning

confidence: 99%

Evolution of 3D Printing Methods and Materials for Electrochemical Energy Storage

et al. 2020

View full text Add to dashboard Cite

Additive manufacturing has revolutionized the building of materials, and 3D‐printing has become a useful tool for complex electrode assembly for batteries and supercapacitors. The field initially grew from extrusion‐based methods and quickly evolved to photopolymerization printing, while supercapacitor technologies less sensitive to solvents more often involved material jetting processes. The need to develop higher‐resolution multimaterial printers is borne out in the performance data of recent 3D printed electrochemical energy storage devices. Underpinning every part of a 3D‐printable battery are the printing method and the feed material. These influence material purity, printing fidelity, accuracy, complexity, and the ability to form conductive, ceramic, or solvent‐stable materials. The future of 3D‐printable batteries and electrochemical energy storage devices is reliant on materials and printing methods that are co‐operatively informed by device design. Herein, the material and method requirements in 3D‐printable batteries and supercapacitors are addressed and requirements for the future of the field are outlined by linking existing performance limitations to requirements for printable energy‐storage materials, casings, and direct printing of electrodes and electrolytes. A guide to materials and printing method choice best suited for alternative‐form‐factor energy‐storage devices to be designed and integrated into the devices they power is thus provided.

show abstract

Three-Dimensional, High-Resolution Printing of Carbon Nanotube/Liquid Metal Composites with Mechanical and Electrical Reinforcement

Cited by 143 publications

References 26 publications

Ferromagnetic Liquid Metal Putty‐Like Material with Transformed Shape and Reconfigurable Polarity

Ferromagnetic Liquid Metal Putty‐Like Material with Transformed Shape and Reconfigurable Polarity

Liquid Metal Direct Write and 3D Printing: A Review

Evolution of 3D Printing Methods and Materials for Electrochemical Energy Storage

Contact Info

Product

Resources

About