Structural characterisation of gold nanowire arrays

Milenković, Srdjan; Nakayama, Tomonobu; Rohwerder, Michael; Hassel, Achim Walter

doi:10.1016/j.jcrysgro.2008.10.022

Cited by 9 publications

(15 citation statements)

References 29 publications

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“…SAED performed on a single Au nanobelt shows the characteristic pattern of {110} planes, which is in agreement with the results obtained by electron backscattered diffraction (EBSD). [36] This is different from all the reported results for the Au nanobelts synthesized by wet chemical methods. [9,37,38] The SAED patterns are essentially identical over the entire belt, which proves the single crystalline and structurally uniform nature of the nanobelts.…”

Section: Physicochemical Characterization Of Au Nanobeltscontrasting

confidence: 69%

“…[33][34][35][36] Briefly, pre-alloys were prepared using 99.999 % Au and high-purity Fe, which was zone-refined five times in-house, by induction melting under inert atmosphere and drop-casting into a cylindrical copper mould. Subsequently, the as-cast ingots were inserted into alumina crucibles and processed in a Bridgman-type crystal-growing facility.…”

Section: Methodsmentioning

confidence: 99%

“…[42,43] This route is suitable for mass production which is an advantage over synthesis via chemical reduction of HAuCl 4 for which it is not possible or at least not that straightforward. [9,36,37] These Au nanobelts are potential candidates for real applications with their high and stable electrochemical catalytic activity.…”

Section: Electrocatalytic Activity Toward Methanol Oxidationmentioning

confidence: 99%

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Reactivity of Gold Nanobelts with Unique {110} Facets

2010

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Gold nanobelts were synthesized by directional solidification of the Fe-Au eutectoid followed by selective phase dissolution. Cleaning from organic molecules was performed in alkaline solution by PbO(2) deposition/dissolution to avoid surface reconstruction. The electrochemical behaviour of the Au nanobelts was determined by structure-sensitive electrochemical reactions, and the findings confirm the results obtained by selected area electron diffraction (SAED). The underpotential deposition (UPD) of lead under alkaline conditions and cyclic voltammograms (CVs) in sulphuric acid revealed an unusual large amount of (110) domains (>65%). Finally, after cleaning the Au nanobelts showed a higher and stable electrocatalytic behaviour toward methanol oxidation in alkaline media. The possible mechanism and the potential applications of the Au nanobelts are discussed.

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Section: Physicochemical Characterization Of Au Nanobeltscontrasting

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Section: Electrocatalytic Activity Toward Methanol Oxidationmentioning

confidence: 99%

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Reactivity of Gold Nanobelts with Unique {110} Facets

2010

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“…Thus produced NW arrays exhibit several features that make them unique. First of all, the Kikuchi patterns obtained by the electron backscatter diffraction (EBSD) of the individual NWs taken at different positions of the sample showed that they are single crystalline and have the same crystallographic orientation, even azimuthally [47,48]. Further, the obtained nanostructures exhibit extremely high aspect ratios (>1000) [46], unreachable by most other techniques.…”

Section: Preparation Of Diverse Nanostructuresmentioning

confidence: 99%

Preparation and specific properties of single crystalline metallic nanowires

Hassel

Bello-Rodriguez

Sutherland-Smith

et al. 2010

Physica Status Solidi (b)

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Directional solidification of eutectics is a route to produce isooriented metallic single crystalline nanowires (NWs). Etching or electrochemical oxidation allows selective dissolution of either of the phases to produce NW arrays, isolated NWs, nanopore arrays and also derived structures by combining various process steps. A good understanding of the thermodynamics and the kinetics of the phase transformation and chemical reactions including electrodissolution, passivation, selective etching, complexing of reaction products and electrodeposition in the systems NiAl-X (X ¼ Re, W, Mo), Ag-Cu and Fe-Au was reached. Functional devices based on these NWs, like high aspect ratio NW based STM tips, nanoelectromechanical systems (NEMS), NW pH sensors and sensor arrays were constructed.Array of rhenium single crystalline NWs embedded in the NiAl matrix after partial dissolution of the matrix.

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“…1D nanostructures in the form of wires, rods, belts and tubes have long been the focus of intensive research owing to their unique applications in mesoscopic physics and fabrication of nanoscale devices [23][24][25]. It is generally accepted that 1D nanostructures provide a good system for the investigation of the dependence of electrical and thermal transport or mechanical properties on dimensionality and size reduction (quantum confinement) [26]. Of the many elements and compounds from which nanowires may be made, gold is technologically important for its low electrical resistivity (2.21 Ω cm) [27], its inertness to attack by air and its resistance to sulfur-based tarnishing [28].…”

Section: Introductionmentioning

confidence: 99%