Eutectic crystallized FePd nanoparticles for liquid metal magnet

Shao, Zefan; An, Lu; Li, Zheng; Huang, Yulong; Hu, Yong; Ren, Shenqiang

doi:10.1039/d0cc02618b

Cited by 12 publications

(9 citation statements)

References 22 publications

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“…Upon applying an external magnetic field, the resistivity of the composite clearly decreased due to the reduced spacing of Fe particles arisen from the magnetic field induced particle alignment and the increased strain caused by the sample deformation. Moreover, particles bearing magnetic properties such as Fe, Ni and Co have been successfully added for preparing magnetically responsive LM composites [42][43][44][45]. Ren et al reported a simple method for synthesizing LM-based magnetoactive slurries (LMMSs) by adding magnetic iron particles into a Ga-based LM matrix (Figure 6a) [46].…”

Section: Lm-inorganic Nanoparticle Compositesmentioning

confidence: 99%

“…Moreover, particles bearing magnetic properties such as Fe, Ni and Co have been successfully added for preparing magnetically responsive LM composites [ 42 , 43 , 44 , 45 ]. Ren et al reported a simple method for synthesizing LM-based magnetoactive slurries (LMMSs) by adding magnetic iron particles into a Ga-based LM matrix ( Figure 6 a) [ 46 ].…”

Section: Synthesis Of Lm Based Materialsmentioning

confidence: 99%

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Ga Based Particles, Alloys and Composites: Fabrication and Applications

Guo

Zong

et al. 2021

Nanomaterials

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Liquid metal (LM) materials, including pure gallium (Ga) LM, eutectic alloys and their composites with organic polymers and inorganic nanoparticles, are cutting-edge functional materials owing to their outstanding electrical conductivity, thermal conductivity, extraordinary mechanical compliance, deformability and excellent biocompatibility. The unique properties of LM-based materials at room temperatures can overcome the drawbacks of the conventional electronic devices, particularly high thermal, electrical conductivities and their fluidic property, which would open tremendous opportunities for the fundamental research and practical applications of stretchable and wearable electronic devices. Therefore, research interest has been increasingly devoted to the fabrication methodologies of LM nanoparticles and their functional composites. In this review, we intend to present an overview of the state-of-art protocols for the synthesis of Ga-based materials, to introduce their potential applications in the fields ranging from wearable electronics, energy storage batteries and energy harvesting devices to bio-applications, and to discuss challenges and opportunities in future studies.

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Section: Lm-inorganic Nanoparticle Compositesmentioning

confidence: 99%

Section: Synthesis Of Lm Based Materialsmentioning

confidence: 99%

Ga Based Particles, Alloys and Composites: Fabrication and Applications

Guo

Zong

et al. 2021

Nanomaterials

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“…Fe/Pd particles showed an electrocatalytic effect when compared with Pd [ 16 ]. The properties of Fe-Pd alloys depend on their composition and structural characteristics [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Structural Transformations of Fe-Pd Powder Alloys Formed by Galvanic Replacement, Annealing and Acid Treatment

et al. 2022

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In this article, we report the preparation and structural features of Fe-Pd powder alloys formed by galvanic replacement, annealing and selective dissolution of iron via acid treatment. The alloys were studied by the X-ray diffraction phase analysis, Mössbauer spectroscopy, scanning electron microscopy, and energy-dispersive spectroscopy. The Fe@Pd core–shell particles were obtained by a galvanic replacement reaction occurring upon treatment of a body-centered cubic (bcc) iron powder by a solution containing PdCl42− ions. It was found that the shells are a face-centered cubic (fcc) Pd(Fe) solid solution. HCl acid treatment of the Fe@Pd core–shell particles resulted in the formation of hollow Pd-based particles, as the bcc phase was selectively dissolved from the cores. Annealing of the Fe@Pd core–shell particles at 800 °C led to the formation of fcc Fe-Pd solid solution. Acid treatment of the Fe-Pd alloys formed by annealing of the core–shell particles allowed selectively dissolving iron from the bcc Fe-based phase (Fe(Pd) solid solution), while the fcc Fe-rich Fe-Pd solid solution remained stable (resistant to acid corrosion). It was demonstrated that the phase composition and the Fe/Pd ratio in the alloys (phases) can be tailored by applying annealing and/or acid treatment to the as-synthesized Fe@Pd core–shell particles.

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“…Recently, FePd alloy have also attracted a growing interest in the scientific community because of their possibility to combine the properties of magnetic (Fe) and noble (Pd) metal elements in a multifunctional alloy [ 18 , 19 , 20 , 21 , 22 ]. The chemical composition of the FePd binary alloy system strongly influences its structure and magnetic properties allowing the use in a variety of applications [ 21 , 23 , 24 , 25 , 26 ]. These properties include magnetic shape memory effect for the Fe 70 Pd 30 alloys [ 27 , 28 , 29 , 30 , 31 ], high perpendicular magnetic anisotropy for Fe 50 Pd 50 [ 32 , 33 ], as well as hydrogen absorption characteristics for the palladium-rich FePd material [ 34 , 35 ], catalytic activities [ 36 , 37 ] and SERS devices [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Structural, Wetting and Magnetic Properties of Sputtered Fe70Pd30 Thin Film with Nanostructured Surface Induced by Dealloying Process

et al. 2021

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FePd alloys in the thin film form represent a multipurpose and versatile material with relevant chemical and physical properties studied in different research fields. Moreover, the ability to manipulate and fine-tune the film surface with nanometric scale precision represents a degree of freedom useful to adapt these thin film properties to the demands of different desired applications. In this manuscript, Fe70Pd30 (at. %) thin films are prepared with a thickness of 50 and 200 nm by means of the widely used co-sputtering deposition technique. Subsequently, selective removal of the iron element from the alloy and the consequent surface diffusion of the palladium was induced by a dealloying treatment under free corrosion conditions in hydrochloric acid. The size and shape of the grains of the as-deposited thin films determine the dissolution rate of the iron element with a direct consequence not only on the surface morphology and the stoichiometry of the alloy but also on the wetting and magnetic properties of the sample. X-ray diffraction, Scanning Electron Microscopy (SEM) images, contact angle and magnetic measurements have been performed to provide a thorough characterisation of the fundamental properties of these nanostructured bimetallic thin films.

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Eutectic crystallized FePd nanoparticles for liquid metal magnet

Abstract: A liquid metal magnet achieved by eutectic-grown FePd nanoparticles in a gallium liquid metal medium.

Cited by 12 publications

References 22 publications

Ga Based Particles, Alloys and Composites: Fabrication and Applications

Ga Based Particles, Alloys and Composites: Fabrication and Applications

Morphological and Structural Transformations of Fe-Pd Powder Alloys Formed by Galvanic Replacement, Annealing and Acid Treatment

Structural, Wetting and Magnetic Properties of Sputtered Fe70Pd30 Thin Film with Nanostructured Surface Induced by Dealloying Process

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