Template-assisted assembly of transition metal nanoparticles on oxide ultrathin films

Gavioli, Luca; Cavaliere, Emanuele; Agnoli, Stefano; Barcaro, Giovanni; Fortunelli, Alessandro; Granozzi, Gaetano

doi:10.1016/j.progsurf.2011.02.001

Cited by 40 publications

(64 citation statements)

References 111 publications

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“…The oxide layers are positively charged and rumpled with anions protruding above cations. The highly ordered array of vacancies in the oxide layer could be further exploited to realize the template-assisted self-assembly of metal nanoparticles, 63 here on a magnetic substrate.…”

Section: Discussionmentioning

confidence: 99%

Self-organized chromium oxide monolayers on Fe(001)

et al. 2013

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The oxygen-saturated Fe(001)-p(1 × 1)O surface has been used as a template to stabilize two-dimensional Cr oxides on Fe(001). Cr deposition at 400 • C leads to two different well-ordered phases, depending on the amount of Cr deposited. In the submonolayer regime a novel c(4 × 2) overlayer self-assembles on the Fe(001)-p(1 × 1)O surface, saturating for a coverage of about 0.75 monolayers. This phase becomes unstable for higher coverages, when a ( √ 5 × √ 5)R27 • superstructure emerges. The structural and electronic details of the two one-layer-thick oxides are studied by combining high-resolution scanning tunneling microscopy, low-energy electron diffraction, Auger electron spectroscopy, and density functional theory.

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Section: Discussionmentioning

confidence: 99%

Self-organized chromium oxide monolayers on Fe(001)

et al. 2013

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“…[6] and references therein). These long-range ordered defects have been mainly investigated with respect to their chemical reactivity [7] or their properties to drive the self-assembly of nanoparticles [8], and it is expected that they can also heavily affect the electronic structure of the metal-oxide interface.…”

Section: Introductionmentioning

confidence: 99%

Combined spectroscopic and ab initio investigation of monolayer-range Cr oxides on Fe(001): The effect of ordered vacancy superstructure

et al. 2017

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We investigated the electronic structure of an ultrathin Cr oxide film prepared by growing about 0.8 monolayers of Cr on the oxygen-terminated Fe(001)-p(1×1)O surface and characterized by the formation of an ordered array of Cr vacancies producing a ( √ 5× √ 5)R27• superstructure. We combined experimental techniques such as angle-and spin-resolved photoemission spectroscopy, low-energy electron diffraction, and scanning tunneling spectroscopy with ab initio calculations, focusing on (i) the peculiar energy dispersion of O 2p states and (ii) the orbital and spin character of Cr 3d states. We show that the experimental O 2p dispersion can be related to the presence of an ordered vacancy lattice. The comparison with the existing literature on the oxidation of bulk Cr(001), where a network of Cr vacancies with a short-range crystallographic order is present, reveals a similar effect on O states. The valence electronic structure of the Cr oxide layer is mostly composed by spin-minority Cr states, consistent with an antiferromagnetic coupling with the Fe substrate.

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“…These have been extensively studied by the authors and reviewed previously [11,12,15,55,134], so that we do not repeat their discussion here and we refer the reader to these previous reviews.…”

Section: Electronic Ground State (Occupied Orbitals)mentioning

confidence: 99%

Atomistic and Electronic Structure Methods for Nanostructured Oxide Interfaces

Barcaro

Sementa

Negreiros

et al. 2016

Oxide Materials at the Two-Dimensional Limit

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An overview is given of methods for the computational prediction of the atomistic and electronic structures of nanoscale oxide interfaces. Global optimization approaches for structure prediction, together with total energy and electronic structure methods are reviewed and discussed. Our aim is to furnish conceptual instruments to select the optimal (i.e., the most accurate and least costly) method for treating a given system, and to understand the potentialities and limi-

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Template-assisted assembly of transition metal nanoparticles on oxide ultrathin films

Cited by 40 publications

References 111 publications

Self-organized chromium oxide monolayers on Fe(001)

Self-organized chromium oxide monolayers on Fe(001)

Combined spectroscopic and ab initio investigation of monolayer-range Cr oxides on Fe(001): The effect of ordered vacancy superstructure

Atomistic and Electronic Structure Methods for Nanostructured Oxide Interfaces

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