Two-dimensional Ir cluster lattice on a graphene moiré on Ir(111).

  title={Two-dimensional Ir cluster lattice on a graphene moir{\'e} on Ir(111).},
  author={Alpha T. N’Diaye and Sebastian Bleikamp and Peter Julian Feibelman and Thomas Michely},
  journal={Physical review letters},
  volume={97 21},
Lattices of Ir clusters have been grown by vapor phase deposition on graphene moirés on Ir(111). The clusters are highly ordered, and spatially and thermally stable below 500 K. Their narrow size distribution is tunable from 4 to about 130 atoms. A model for cluster binding to the graphene is presented based on scanning tunneling microscopy and density functional theory. The proposed binding mechanism suggests that similar cluster lattices might be grown of materials other than Ir. 
Sm cluster superlattice on graphene/Ir(111)
We report on thefirst example of a self-assembled rare earth cluster superlattice. As a template, we use themoiré pattern formed by graphene on Ir(111); its lattice constant of 2.52nmdefines theExpand
Structure of epitaxial graphene on Ir(111)
A graphene monolayer has been prepared on an Ir(111) single crystal via pyrolytic cleavage of ethylene (C2H4). The resulting superstructure has been examined with scanning tunneling microscopy (STM)Expand
Structure of graphene on the Ni(110) surface
The structure of graphene on Ni(110) was studied using scanning tunneling microscopy (STM) and low-energy electron diffraction spectroscopy. STM images show a Moire structure, depending on theExpand
A Monolayer of Hexagonal Boron Nitride on Ir(111) as a Template for Cluster Superlattices.
Ab initio calculations explain the extraordinarily strong Ir cluster binding through selective sp3 rehybridization of boron nitride involving B-Ir cluster bonds and a strengthening of the nitrogen bonds to the Ir substrate in a specific, initially only chemisorbed valley area within the moiré. Expand
Studies of Au Clusters on a Graphene Covered Ir(111) substrate: Cluster Growth and CO Adsorption
The chemical properties of 0.2-1 ML Au clusters have been studied using X-ray photoelectron spectroscopy (XPS). By exposing the clusters to CO, at 10^-7 mbar, in periods of two minutes, whileExpand
Atomic structure and crystalline order of graphene-supported ir nanoparticle lattices.
It is demonstrated that Ir nanoparticles on graphene/Ir(111) form a crystallographic superlattice with high perfection, and the nanoparticles reside epitaxially on top of the graphene moiré structure on Ir(111), resulting in significant lateral compressive intraparticle strain. Expand
Chemical origin of a graphene moiré overlayer on Ru(0001).
It is shown that the measured corrugation originates mainly from a geometric buckling of the graphene sheet, induced by alternating weak and strong chemical interactions with the Ru support. Expand
Moiré induced organization of size-selected Pt clusters soft landed on epitaxial graphene
The quantitative determination of the proportion of organized clusters reveals that the obtained hexagonal array of the almost spherical nanoparticles is stable up to 650 K, which is an indication of a strong cluster-surface interaction. Expand
A versatile fabrication method for cluster superlattices
On the graphene moire on Ir(111) a variety of highly perfect cluster superlattices can be grown as shown for Ir, Pt, W and Re. Even materials that do not form cluster superlattices upon roomExpand
Ion impacts on graphene/Ir(111): interface channeling, vacancy funnels, and a nanomesh.
By combining ion beam experiments and atomistic simulations, it is demonstrated that the ions are channeled in between graphene and the substrate, giving rise to chains of vacancy clusters with their edges bending down toward the substrate. Expand