Nanowire formation is preceded by nanotube growth in templated electrodeposition of cobalt hybrid nanostructures

Dryden, Daniel M.; Vidu, Ruxandra; Stroeve, Pieter

doi:10.1088/0957-4484/27/44/445302

Cited by 8 publications

(7 citation statements)

References 37 publications

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“…The observed current loop (crossover) at −0.89 V vs Ag/AgCl indicates that the cobalt deposition occurs via nucleation and growth, in agreement with the results reported in ref . At slower scan rates of 1 or 5 mV/s a notable reduction peak was detected at −0.75 V vs Ag/AgCl, as reported by Dryden et al for Co deposition . By increasing the scan rate a crossover was also observed by the authors, at a similar potential to that reported in this work .…”

Section: Resultssupporting

confidence: 92%

“…At slower scan rates of 1 or 5 mV/s a notable reduction peak was detected at −0.75 V vs Ag/AgCl, as reported by Dryden et al for Co deposition . By increasing the scan rate a crossover was also observed by the authors, at a similar potential to that reported in this work . The corresponding oxidation peak from Co 0 to Co 2+ is evidenced at −0.1 V vs Ag/AgCl.…”

Section: Resultssupporting

confidence: 89%

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Fabrication of Co–Sb Junction Nanowires by Galvanostatic Electrodeposition

Enache,

State,

Mihai

et al. 2024

Langmuir

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This work presents the synthesis of CoSb 3 one-dimensional (1D) thermoelectric nanomaterials using electrodeposition under galvanostatic conditions and polycarbonate membranes as a template (50 nm diameter pores). Cyclic voltammetry measurements have been performed to get preliminary information on the electrochemical reduction process of the involved species. Different current density values in the range 1−4 mA cm −2 have been applied, leading to the formation of nanowires (NWs) and micro-and nanomushroom caps, as evidenced by the scanning electron microscopy and scanning transmission electron microscopy investigations. Through fine-tuning of the current density the desired Co/Sb atomic ratio could be achieved. Energydispersive X-ray spectroscopy analysis showed the formation of CoSb 3 at 1.4 mA cm −2 , and it has also been confirmed by high-resolution transmission electron microscopy and micro-Raman spectroscopy. In this work, we present for the first time the fabrication of a CoSb 3 −Co x Sb y heterojunction on the same NW exhibiting Sbrich and Co-rich alloy segments, prepared by electrodeposition from the same electrolyte by simply varying the applied current density.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 89%

Fabrication of Co–Sb Junction Nanowires by Galvanostatic Electrodeposition

Enache,

State,

Mihai

et al. 2024

Langmuir

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“…However, the growth could not be well-controlled -many deposited structures were just solid wires. A similar behaviour was reported by Dryden et al (2016) for Co, but only with one tube-wire transition located at the end. As shown by both contributors, these structures are very fragile and tend to break at the wire-tube transition.…”

Section: Wire-tube Nanoelementssupporting

confidence: 87%

“…Experimentally, such structures have been prepared by direct electroplating in nanopores or by a related so-called coaxial lithography (Ozel et al 2015). Most works report only one transition, where a tube segment is formed during the initial stage of electroplating (Dryden et al 2016) and its tube wall thickness gradually increases until the growth continues with a solid wire. This was shown, e.g., in case of Co-Pt nanostructures (Arshad et al 2014; diameter 200 nm, tube length about 1 µm).…”

Section: Wire-tube Nanoelementsmentioning

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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“…For film deposition the electrode was constructed with the Au electrode exposed to the solution; for nanowire deposition the non-coated side was exposed to solution, forcing deposition to occur within the pores. An illustration of the sample setup is shown elsewhere [11][12][13].…”

Section: Materials Synthesismentioning

confidence: 99%