Atomic Structure and Crystalline Order of Graphene-Supported Ir Nanoparticle Lattices

Franz, Dirk; Runte, Sven; Busse, Carsten; Schumacher, Stefan; Gerber, Timm; Michely, Thomas; Mantilla, M.; Kılıç, Volkan; Zegenhagen, J.; Stierle, Andreas

doi:10.1103/physrevlett.110.065503

Cited by 48 publications

(62 citation statements)

References 22 publications

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“…The two lattices exhibit a novel type of epitaxial relation where the sapphire imparts to the SAM's crystallites a preferred azimuthal orientation with a large angular width and powderlike tails in the scattering profiles. This is in contrast to existing experimental evidence and theory for substrate-monolayer epitaxy, where identical symmetry, but different lattice constant, usually yields a compression and relative azimuthal rotation of the substrate and monolayer lattices [25][26][27][28][29][30][31][32][33][34][35]. In addition, ξ is found to increase as the relative azimuthal rotation angle, φ, decreases to zero.…”

contrasting

confidence: 90%

Pseudorotational Epitaxy of Self-Assembled Octadecyltrichlorosilane Monolayers on Sapphire (0001)

et al. 2014

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The structure of octadecyltrichlorosilane self-assembled monolayers (SAMs) on sapphire (0001) was studied by Å-resolution surface-specific x-ray scattering methods. The monolayer was found to consist of three sublayers where the outermost layer corresponds to vertically oriented, closely packed alkyl tails. Laterally, the monolayer is hexagonally packed and exhibits pseudorotational epitaxy to the sapphire, manifested by a broad scattering peak at zero relative azimuthal rotation, with long powderlike tails. The lattice mismatch of ∼ 1%-3% to the sapphire's and the different length scale introduced by the lateral Si-O-Si bonding prohibit positional epitaxy. However, the substrate induces an intriguing increase in the crystalline coherence length of the SAM's powderlike crystallites when rotationally aligned with the sapphire's lattice. The increase correlates well with the rotational dependence of the separation of corresponding substrate-monolayer lattice sites.

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confidence: 90%

Pseudorotational Epitaxy of Self-Assembled Octadecyltrichlorosilane Monolayers on Sapphire (0001)

et al. 2014

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“…In Section 5.1, we describe the behavior for deposition of various metals (Ir, Pt, W, Re, Fe, Au) on Ir(1 1 1)-supported graphene, where Ir, Pt and W form well-ordered NC arrays, but not Fe and Au [105][106][107][108]. …”

Section: Other Metal Growth On Graphenementioning

confidence: 99%

Growth morphology and properties of metals on graphene

Liu

Han

Evans

et al. 2015

Progress in Surface Science

146

125

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a b s t r a c tGraphene, a single atomic layer of graphite, has been the focus of recent intensive studies due to its novel electronic and structural properties. Metals grown on graphene also have been of interest because of their potential use as metal contacts in graphene devices, for spintronics applications, and for catalysis. All of these applications require good understanding and control of the metal growth morphology, which in part reflects the strength of the metal-graphene bond. Also of importance is whether the interaction between graphene and metal is sufficiently strong to modify the electronic structure of graphene. In this review, we will discuss recent experimental and computational studies related to deposition of metals on graphene supported on various substrates (SiC, SiO 2 , and hexagonal close-packed metal surfaces). Of specific interest are the metal-graphene interactions (adsorption energies and diffusion barriers of metal adatoms), and the crystal structures and thermal stability of the metal nanoclusters.

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“…Experimentally, a 3D growth has been observed for Ir deposition on graphene grown on Ir(111) [34,35]. We have also investigated the morphology of Fe growth on epitaxial graphene prepared on 6H-SiC(0001) by atomic beam deposition and scanning tunneling spectroscopy (STM).…”

Section: Growth Morphologymentioning

confidence: 99%

Structures and magnetic properties of Fe clusters on graphene

et al. 2014

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Adsorption of Fe atom and Fe n (n = 2−7) clusters on graphene was studied by first-principles calculation and chemical bonding analysis. Various adsorption configurations, i.e., Fe clusters placed at different lateral positions and with different orientations with respect to the graphene lattice, have been optimized to locate the ground-state geometry of the Fe clusters on graphene. The calculation shows that Fe on graphene prefers a three-dimensional growth mode with a critical size of two atoms. The calculation also shows that Fe n clusters on graphene exhibit ferromagnetic order and large magnetic moment. However, due to charge redistribution caused by the interaction with graphene, some Fe n clusters on graphene have smaller magnetic moments compared to the corresponding free-standing clusters. Adsorption of Fe n clusters also induces magnetic moments in graphene, and the induced magnetic moment on each carbon atom in graphene is correlated with the distortion of the graphene lattice.

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Atomic Structure and Crystalline Order of Graphene-Supported Ir Nanoparticle Lattices

Cited by 48 publications

References 22 publications

Pseudorotational Epitaxy of Self-Assembled Octadecyltrichlorosilane Monolayers on Sapphire (0001)

Pseudorotational Epitaxy of Self-Assembled Octadecyltrichlorosilane Monolayers on Sapphire (0001)

Growth morphology and properties of metals on graphene

Structures and magnetic properties of Fe clusters on graphene

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