RHEED study of Pd film growth on Al2O3 (111)/NiAl (110)

Moroz, V. G.; Lykhach, Yaroslava; Yoshitake, Michiko

doi:10.1016/j.tsf.2004.05.109

Cited by 9 publications

(9 citation statements)

References 24 publications

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“…When the Pd was deposited at 300 K, the islands were three-dimensional but with a low aspect ratio . There are also reports on island formation for Pd deposited on oxide surfaces with the corundum structure. ,− Future experiments are planned to extend this investigation for different Pd thicknesses in order to shed light on the Pd growth mechanism on Cr 2 O 3 .…”

Section: Resultsmentioning

confidence: 95%

Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

et al. 2014

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A detailed investigation concerning the atomic structure of Cr 2 O 3 and Pd/Cr 2 O 3 ultrathin films deposited on a Ag(111) single crystal is presented. The films were prepared by MBE (molecular beam epitaxy) and characterized in situ by LEED (low energy electron diffraction), XPS (X-ray photoelectron spectroscopy), and XPD (X-ray photoelectron diffraction). Evidences of rotated domains and an oxygen-terminated Cr 2 O 3 /Ag(111) surface were observed, along with significant contractions of the oxide's outermost interlayer distances. The deposition of Pd atoms on the Cr 2 O 3 surface formed a four-monolayer film, fcc packed and oriented in the [111] direction, which presented changes in monolayer spacing and lateral atomic distance compared to the expected values for bulk Pd. The observed surface structure may shed light on new physical properties such as the induced magnetic ordering in Pd atoms.

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Section: Resultsmentioning

confidence: 95%

Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

et al. 2014

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“…Depending on the amount of deposited Pd, two different growth modes were detected. The formation of polycrystalline phase has been found at low Pd coverages, whereas the appearance of preferentially oriented Pd islands has been detected at Pd coverage 0.5 monolayer (ML) supported by reflection high energy electron diffraction (RHEED) data [24]. When the Pd coverage is getting large, the structural analysis unambiguously shows that the cubic packing of the Pd microcrystals are hexagonal pyramids truncated by the (111) plane and exhibiting (111) and (100) facets.…”

Section: Resultsmentioning

confidence: 88%

Deposition of Pd nanoparticles on ultrathin Al<inf>2</inf>O<inf>3</inf> films

Petram

Becker

et al. 2010

2010 IEEE 5th International Conference on Nano/Micro Engineered and Molecular Systems

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It is widely accepted that self-assembling nanostructure of metals with well-defined spatial order is one of the promising ways for engineering new materials. Recent years revealed substantial progress in fabricating metal nanoparticles on ultrathin oxide films due to their ordered surface. In this work, we present the results on the adsorption of Pd nanoparticles on the ultrathin Al 2 O 3 films prepared on the Ni 3 Al(111) substrate. The thermal stability of the Pd nanoparticles has been studied. The results showed that the Pd nanoparticles with size of about 4 nm are stable at 580 K, but aggregation of the Pd nanoparticles was found at 730 K.

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“…These clusters have two orientations with respect to the oxide lattice of y-Al 2 O 3 (100): for one population their [1-10] axis is along direction [0-10] of the oxide surface (Au-Pt(111) [1][2][3][4][5][6][7][8][9][10]// Al 2 O 3 (100)[0-10]); they also rotate relative to each other by 1801 about direction (111). 44,45 The corresponding reciprocallattice points at the two azimuths are schematically plotted in Fig. 9(c) and (d) (blue spots and circles).…”

Section: Resultsmentioning

confidence: 99%

Temperature-dependent structuring of Au–Pt bimetallic nanoclusters on a thin film of Al₂O₃/NiAl(100)

Luo

Wang

Chao

et al. 2011

Phys. Chem. Chem. Phys.

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Au-Pt bimetallic nanoclusters on a thin film of Al(2)O(3)/NiAl(100) undergo significant structural evolution on variation of the temperature. Au and Pt deposited sequentially from the vapor onto thin-film Al(2)O(3)/NiAl(100) at 300 K form preferentially bimetallic nanoclusters (diameter ≦ 6.0 nm and height ≦ 0.8 nm) with both Au and Pt coexisting at the cluster surface, despite the order of metal deposition. These bimetallic clusters are structurally ordered, have a fcc phase and grow with their facets either (111) or (001) parallel to the θ-Al(2)O(3)(100) surface. Upon annealing the clusters to 400-500 K, the Au atoms inside the clusters migrate toward the surface, resulting in formation of a structure with a Pt core and an Au shell. Annealing the sample to 500-650 K reorients the bimetallic clusters--all clusters have their (001) facets parallel to the oxide surface--and induces oxidation of Pt. Such annealed bimetallic clusters become encapsulated with the aluminium-oxide materials and a few Au remain on the surface.

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RHEED study of Pd film growth on Al2O3 (111)/NiAl (110)

Cited by 9 publications

References 24 publications

Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Deposition of Pd nanoparticles on ultrathin Al<inf>2</inf>O<inf>3</inf> films

Temperature-dependent structuring of Au–Pt bimetallic nanoclusters on a thin film of Al₂O₃/NiAl(100)

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RHEED study of Pd film growth on Al2O3 (111)/NiAl (110)

Cited by 9 publications

References 24 publications

Atomic Structure of Cr2O3/Ag(111) and Pd/Cr2O3/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Atomic Structure of Cr2O3/Ag(111) and Pd/Cr2O3/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Deposition of Pd nanoparticles on ultrathin Al<inf>2</inf>O<inf>3</inf> films

Temperature-dependent structuring of Au–Pt bimetallic nanoclusters on a thin film of Al2O3/NiAl(100)

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Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Atomic Structure of Cr₂O₃/Ag(111) and Pd/Cr₂O₃/Ag(111) Surfaces: A Photoelectron Diffraction Investigation

Temperature-dependent structuring of Au–Pt bimetallic nanoclusters on a thin film of Al₂O₃/NiAl(100)