Growth of self-organized cobalt nanostructures on Au(111) vicinal surfaces

Repain, Vincent; Berroir, Jean-Marc; Rousset, Sylvie; Lecoeur, J.

doi:10.1016/s0039-6028(99)01203-0

Cited by 72 publications

(40 citation statements)

References 23 publications

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“…Previous STM measurements reported that the Co adatoms nucleate at the step edges to form rectangular islands connected to each other, leading to the organization of nanowires with long-range order in a submonolayer range. 8,9 Fig . 2 shows the normal emission ARPES spectra near E F taken on clean Au(788) and surfaces with Co coverages of 0.04-1.28 ML.…”

Section: Resultsmentioning

confidence: 99%

“…11 The growth of Co on the vicinal Au(111) surfaces has been studied in the submonolayer range and long-range ordered Co nanostructures have been achieved. 8,9 Our recent work reveals that the Fe atoms dosed on the vicinal Au(111) surfaces adsorb at Auf111g step edges to form one-dimensional nanowires 10 and show electronic structures reflecting low dimensionality. 12 In this study, the electronic structures of nanostructured ferromagnetic transition metals (Fe, Co, Ni) grown by step decoration of the Au(788) surface are investigated by angle-resolved-photoemission spectroscopy (ARPES) measurements.…”

Section: Introductionmentioning

confidence: 99%

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Electronic structures of nanostructured transition metals on the Au(788) surface

Fujisawa

Shiraki

Nantoh

et al. 2005

Surface & Interface Analysis

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The electronic structures of nanostructured transition metals (Fe, Co, Ni) grown by step decoration of the Au(788) surface are investigated by normal emission angle-resolved photoemission spectroscopy (ARPES). As the coverage of the transition metals is increased, the intensity of Au 5d valence bands decreases but the peak positions do not change, suggesting that the mixing between Au 5d and 3d of transition metals is negligibly weak. The coverage dependences of ARPES spectra near the Fermi level .E F / for Fe, Co and Ni are discussed and compared with the photoemission results on bulk materials. In the higher coverage regions, we identify the observed 3d peaks near E F as ferromagnetic exchange splitting bands with similar exchange energy to the bulk. In contrast, at lower coverages, the exchange splitting vanishes for Fe and Co and becomes small for Ni. The origins of this behaviour are attributed to atomic volume, structural dimensionality and finite temperature effects.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electronic structures of nanostructured transition metals on the Au(788) surface

Fujisawa

Shiraki

Nantoh

et al. 2005

Surface & Interface Analysis

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“…There, small Co islands are regularly arranged with 2 AL in height [139,140,152,173]. However, Co growth in vacuum strongly depends on the deposition temperature and even at larger nominal Co coverage the islands do not coalesce but increase vertically [129,139,150,152,191,194].…”

Section: Ec-stm Investigationsmentioning

confidence: 99%

“…Thereby it is assumed, that deposition follows a layer-by-layer mode regularly distributed [152,194] as it is observed for metal deposition in vacuum. Only in few cases a bilayer is initially deposited such as for Co. As mentioned above, in the experiments it is observed, that Co is deposited in extended Co islands, with a typical lateral size of 0.25 µm 2 , as shown in A typical example is given in Figure 3.8(a).…”

Section: Stmmentioning

confidence: 99%

Spin-polarized scanning tunneling microscopy at the solid/liquid interface

Majer

Schindler

2015

Surface Science

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The spin-polarized scanning tunneling microscopy (sp-STM) is demonstrated between a magnetized STM tip and a magnetic substrate at the solid/liquid interface under electrochemical conditions at room temperature. Thereby, sp-STM at the solid/liquid interface is accomplished using the differential magnetic mode established by Wulfhekel and Kirschner for investigations at the solid/vacuum interface. The implementation of the sp-STM setup into the electrochemical STM is an important part of this thesis. Special attention is paid to the magnetostriction effect of possible magnetic STM tips. As a model system extended Co islands are electrochemically grown on an Au(111) single crystal. An appropriate electrochemical environment is required to ensure metal Co islands on Au(111), since Co deposition occurs at low potentials where hydrogen evolution and dissolved oxygen contributes to electrochemical reactions at the substrate. After sample preparation extended Co islands on Au(111) up to four atomic layers in height are observed with bare Au(111) areas in between, which is an ideal sample surface for sp-STM at the solid/liquid interface showing ferromagnetic and diamagnetic areas. Sp-STM is employed in-situ at the solid/liquid interface to observe not only sample topography but also sample magnetization of the model system Co/Au (111)

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“…There are spectacular examples of metal clusters self-assembly driven by strain-relief patterns and high energy of step edges [1][2], metal clusters on reconstructed semiconductor surfaces [3] etc. Yet, only a very limited number of such examples are known to this date and the choice of templates is rather scarce.…”

Section: Introductionmentioning

confidence: 99%

Oxide templates for self-assembling arrays of metal nanoclusters

et al. 2006

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It is widely accepted that self-assembling building blocks is one of the promising ways for engineering new materials. Recent years reveal substantial progress in fabricating colloidal particles, polymer blocks and supramolecular aggregates of organic molecules.Despite substantial progress in molecular self-assembly there is still a lack of simple blocks made of "solid matter" (e.g. metals, oxides etc.) with well-defined crystal structure and spatial order. Here we demonstrate that ordered arrays of metal nanoclusters can be fabricated by self-assembly on a wide range of oxide templates. These nano-templates are produced either by depositing an alien oxide film or by oxidizing a metal/metal oxide substrate.

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Growth of self-organized cobalt nanostructures on Au(111) vicinal surfaces

Cited by 72 publications

References 23 publications

Electronic structures of nanostructured transition metals on the Au(788) surface

Electronic structures of nanostructured transition metals on the Au(788) surface

Spin-polarized scanning tunneling microscopy at the solid/liquid interface

Oxide templates for self-assembling arrays of metal nanoclusters

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