Versatile method for template-free synthesis of single crystalline metal and metal alloy nanowires

Scott, John; Totonjian, Daniel; Martin, Aiden A.; Tran, Toan Trong; Fang, Jinghua; Toth, Milos; McDonagh, Andrew M.; Aharonovich, Igor; Lobo, Charlene

doi:10.1039/c5nr07307c

Cited by 16 publications

(12 citation statements)

References 40 publications

(40 reference statements)

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“…However, the morphology of particles, including the aspect ratio, always needs appropriate templates [22][23][24][25][26][27] or via chemical processes by tuning synthetic conditions, such as temperature, reaction time and reaction media, as well as the ratio and concentration of reagents [28,29]. The template-based method associates with its high cost and timeconsuming nature, this method still cannot be adopted for large-scale production [1,30]. Although chemical process method is relatively low-cost and simple, some reaction parameters, including temperature and pH, as well as an external magnetic field (EMF), must be strictly controlled [8,18,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Kartikowati

Iwaki

et al. 2020

R. Soc. open sci.

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Magnetic wires in highly dense arrays, possessing unique magnetic properties, are eagerly anticipated for inexpensive and scalable fabrication technologies. This study reports a facile method to fabricate arrays of magnetic wires directly assembled from well-dispersed α ″ -Fe 16 N 2 /Al 2 O 3 and Fe 3 O 4 nanoparticles with average diameters of 45 nm and 65 nm, respectively. The magnetic arrays with a height scale of the order of 10 mm were formed on substrate surfaces, which were perpendicular to an applied magnetic field of 15 T. The applied magnetic field aligned the easy axis of the magnetic nanoparticles (MNPs) and resulted in a significant enhancement of the magnetic performance. Hysteresis curves reveal that values of magnetic coercivity and remanent magnetization in the preferred magnetization direction are both higher than that of the nanoparticles, while these values in the perpendicular direction are both lower. Enhancement in the magnetic property for arrays made from spindle-shape α ″ -Fe 16 N 2 /Al 2 O 3 nanoparticles is higher than that made from cube-like α ″ -Fe 16 N 2 /Al 2 O 3 ones, owing to the shape anisotropy of MNPs. Furthermore, the assembled highly magnetic α ″ -Fe 16 N 2 /Al 2 O 3 arrays produced a detectable magnetic field with an intensity of approximately 0.2 T. Although high-intensity external field benefits for the fabrication of magnetic arrays, the newly developed technique provides an environmentally friendly and feasible approach to fabricate magnetic wires in highly dense arrays in open environment condition.

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Section: Introductionmentioning

confidence: 99%

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Kartikowati

Iwaki

et al. 2020

R. Soc. open sci.

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“…5,6 In this regard, the search of new one-dimensional conductive nanowires has attracted an explosive interest due to their attractive potentials to serve as electrical connections in future nanoscale compact circuits. Although the metal nanowires may possess good electronic conductivity by tuning their width 21,22 or components 23 , their chemical stabilities (except of Au) and rigidities are much less satisfying. 11,12 In previous investigations, the metal nanowires, 8,[13][14][15] graphene nanoribbons, [16][17][18][19] and carbon nanotubes 11,15,20 have been considered as nanoscale electrical connections.…”

Section: Introductionmentioning

confidence: 99%

Stable and metallic borophene nanoribbons from first-principles calculations

et al. 2016

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Recently, borophene was reported to be produced on the silver surfaces. 1 We employ density functional theory and electronic transport calculations to investigate the stabilities, electronic structures and transport properties of borophene nanoribbons. The stability of borophene nanoribbon increases with its width and only the lined-edged borophene nanoribbons are stable in the free-standing form. Such anistropic stabilty dependence is ascribed to the large scale delocalization of π electrons along the boron rows. Particularly, all line-edge borophene nanoribbons undergo edge reconstructions, in which the out-of-plane bulking edge atoms are reconstructed to form quasi planar edge structures. Such edge reconstructions have not yet reported, which is critical for the formation of boron nanostrcutrues. Subsequent electronic transport calculations based on non-equilibium Green's function indicate that the line-edge borophene nanoribbons exhibit low-resistivity Ohmic conductance. Our results indicate that the line-edge borophene nanoribbons present remarkable properties (high thermal stabilities, Ohmic contance with low electrical resistivity and good rigidities) and are promising for applications as one-dimensional electrical connections in compact nanoscale circuits.

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“…In the case of the bottom-up approach, another distinction can be done according to whether or not a template giving the final structures the proper shape is used. The first ones, template-based methods, are usually preferred, still some templateless alternatives with sufficient control over the geometry exist (Scott et al 2016, Jia et al 2005). Below we will briefly discuss the main techniques used for the deposition of NWs and NTs, most of these are bottom-up techniques that employ a template.…”

Section: Fabricationmentioning

confidence: 99%

Magnetic Nanowires and Nanotubes

Staňo

Fruchart

2018

Handbook of Magnetic Materials

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We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By nano we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry (change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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Versatile method for template-free synthesis of single crystalline metal and metal alloy nanowires

Cited by 16 publications

References 40 publications

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Enhanced magnetic performance of aligned wires assembled from nanoparticles: from nanoscale to macroscale

Stable and metallic borophene nanoribbons from first-principles calculations

Magnetic Nanowires and Nanotubes

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