On the role of Fe in the growth of single crystalline heteroepitaxial Au thin films on sapphire

Amram, Dor; Rabkin, Eugen

doi:10.1016/j.actamat.2013.03.038

Cited by 28 publications

(15 citation statements)

References 43 publications

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“…Borchers et al [19] investigated magnetrons puttered Fe (2 nm)/Au (10 nm)m ultilayers (70) on Si <110> substrate by cross-sectional transmission electron microscopy and they showedt hat the multilayers exhibit bcc iron growth with aN ishiyama-Wassermann orientation relationship between the Fe and Au layers. Amran and Rabkin [20] deposited an Au-Febilayer on (0001) sapphire substrates and they found severalorientation relationshipsb etween the bcc Fe and the face centered cubic (fcc) Au (Nishiyama-Wassermann, Kurdjumov-Sachs and Greninger-Troiano) dependingonthe deposition sequence. To achieves uch orientationr elationshipst he orientation and lattice distance of the substrates is important.…”

Section: Resultsmentioning

confidence: 98%

Microstructures of magnetron sputtered Fe–Au thin films

Zamponi

Schürmann

Jurgeleit

et al. 2015

International Journal of Materials Research

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Microstructures of magnetron sputtered Fe-Aut hin filmsFreestanding films of highly pure iron and gold multilayers were fabricated and characterized for their intended use as biodegradable implant materials. These samples were deposited using magnetron sputtering on unheated substrates. This technology allows the combination of various noncompounding materials. After annealing for 2h at 685 8 C and 850 8 C, respectively to homogenize the multilayer, the microstructures werei nvestigated using X-ray diffraction, energy dispersive X-ray spectroscopy and scanning transmission electron microscopy. Due to the annealing, the multilayered microstructure convertsintoanew multiphase system consisting of an iron matrix and two different kinds of gold morphologies: segregations alonggrain boundaries and nanosized core-shell like precipitates.

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Section: Resultsmentioning

confidence: 98%

Microstructures of magnetron sputtered Fe–Au thin films

Zamponi

Schürmann

Jurgeleit

et al. 2015

International Journal of Materials Research

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“…The obtained particles were single crystalline and exhibited irregular truncated polyhedral shapes with only {100} and {111} facets present, and [111] axis being normal to the substrate. The in‐plane orientation of the particles was quasi‐random, with some preference for the alignment of the densely packed rows of the {111} plane of Au and of the basal plane of sapphire: Au[110]||Al 2 O 3

[10 \bar{1} 0]

and, to a lesser extent, Au

[\bar{2} 11]

||Al 2 O 3

[10 \bar{1} 0]

. The lateral size of the particles varied from several hundred nanometers to one micrometer, while their height varied from 100 up to 350 nm.…”

Section: Resultsmentioning

confidence: 99%

Self‐Healing and Shape Memory Effects in Gold Microparticles through the Defects‐Mediated Diffusion

et al. 2017

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Some metal alloys subjected to irreversible plastic deformation can repair the inflicted damage and/or recover their original shape upon heating. The conventional shape memory effect in metallic alloys relies on collective, or “military” phase transformations. This work demonstrates a new and fundamentally different type of self‐healing and shape memory in single crystalline faceted nano and microparticles of pure gold, which are plastically deformed with an atomic force microscope tip. It is shown that annealing of the deformed particles at elevated temperatures leads to nearly full recovery of their initial asymmetric polyhedral shape, which does not correspond to global energy minimum shape. The atomistic molecular dynamic simulations demonstrate that the shape recovery of the particles is controlled by the self‐diffusion of gold atoms along the terrace ledges formed during the particles indentation. This ledge‐guided diffusion leads to shape recovery by the irreversible diffusion process. A semiquantitative model of healing developed in this work demonstrates a good agreement with the experimental data.

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“…The microstructure of the ultrathin (5–20 nm) Au(Fe) films has been described in detail in [15]. It was shown that the deposition of a Au film on a thin Fe underlayer resulted in a high-quality quasi-single-crystalline Au films with large grains having diameters of several micrometers.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Amram and Rabkin [15] studied the role of Fe underlayers in the growth of quasi-single-crystalline heteroepitaxial Au thin films on sapphire. The Au layer deposited on Fe exhibited a high degree of in-plane ordering with a large grain size.…”

Section: Introductionmentioning

confidence: 99%

Annealing-induced recovery of indents in thin Au(Fe) bilayer films

Kosinova¹,

Schwaiger²,

Klinger³

et al. 2016

Beilstein J. Nanotechnol.

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We employed depth-sensing nanoindentation to produce ordered arrays of indents on the surface of 50 nm-thick Au(Fe) films deposited on sapphire substrates. The maximum depth of the indents was approximately one-half of the film thickness. The indented films were annealed at a temperature of 700 °C in a forming gas atmosphere. While the onset of solid-state dewetting was observed in the unperturbed regions of the film, no holes to the substrate were observed in the indented regions. Instead, the film annealing resulted in the formation of hillocks at the indent locations, followed by their dissipation and the formation of shallow depressions nearby after subsequent annealing treatments. This annealing-induced evolution of nanoindents was interpreted in terms of annihilation of dislocation loops generated during indentation, accompanied by the formation of nanopores at the grain boundaries and their subsequent dissolution. The application of the processes uncovered in this work show great potential for the patterning of thin films.

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On the role of Fe in the growth of single crystalline heteroepitaxial Au thin films on sapphire

Cited by 28 publications

References 43 publications

Microstructures of magnetron sputtered Fe–Au thin films

Microstructures of magnetron sputtered Fe–Au thin films

Self‐Healing and Shape Memory Effects in Gold Microparticles through the Defects‐Mediated Diffusion

Annealing-induced recovery of indents in thin Au(Fe) bilayer films

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