Bulk termination of the quasicrystalline fivefold surface of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mn>70</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Pd</mml:mi></mml:mrow><mml:mrow><mml:mn>21</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Mn</mml:mi></mml:mrow><mml:mrow>

Papadopolos, Z.; Kasner, G.; Ledieu, J.; Cox, Erik J.; Richardson, Neville V.; Chen, Qiao; Diehl, Renee D.; Lograsso, Thomas A.; Ross, A. R.; McGrath, R.

doi:10.1103/physrevb.66.184207

Cited by 118 publications

(139 citation statements)

References 32 publications

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“…The WF motifs correspond to Mackay clusters truncated in their equatorial plane or hanging down from the surface plane. 9,10 The DS motifs correspond to truncated Bergman clusters or truncated Mackay clusters with a central vacancy. 9,10 The tiling connecting the WF centers is called the τP1 tiling.…”

Section: Resultsmentioning

confidence: 99%

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Self-Organized Molecular Films with Long-Range Quasiperiodic Order

et al. 2014

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Self-organized molecular films with long-range quasiperiodic order have been grown by using the complex potential energy landscape of quasicrystalline surfaces as templates. The long-range order arises from a specific subset of quasilattice sites acting as preferred adsorption sites for the molecules, thus enforcing a quasiperiodic structure in the film. These adsorption sites exhibit a local 5-fold symmetry resulting from the cut by the surface plane through the cluster units identified in the bulk solid. Symmetry matching between the C60 fullerene and the substrate leads to a preferred adsorption configuration of the molecules with a pentagonal face down, a feature unique to quasicrystalline surfaces, enabling efficient chemical bonding at the molecule-substrate interface. This finding offers opportunities to investigate the physical properties of model 2D quasiperiodic systems, as the molecules can be functionalized to yield architectures with tailor-made properties. KeywordsC60, self-assembly, quasiperiodic order, scanning tunneling microscopy, density functional theory, 5-fold symmetry Disciplines Materials Chemistry | Materials Science and Engineering CommentsReprinted with permission from ACS Nano 8 (2014) Q uasicrystals (QCs) were discovered in intermetallic compounds by D. Shechtman, Nobel Prize in Chemistry 2011. 1 They possess long-range order but no translational invariance. They are a special class of complex intermetallics, in the sense that their unit cell is of infinite dimension. QCs have a fascinating beauty associated with forbidden symmetries, like five-, 10-, or 12-fold rotational symmetries not found in periodic systems. Today, the field is very active, and QCs are being discovered in a broad range of systems. Hundreds of intermetallic compounds with quasiperiodic structures have been identified in phase diagrams. 2 But QCs are no longer restricted to intermetallics. Soft QCs are an emerging field in colloidal and supramolecular chemistry. 3,4 Perovskite oxide thin films with quasiperiodic structures have recently been identified, 5 and even water thin films have been predicted to adopt quasiperiodic structures under specific conditions. 6 In this article, we show that molecular films with long-range quasiperiodic order can also be grown by using clean QC surfaces as templates, thus extending the concept of QCs to an even wider materials field.Thorough investigations of QC surfaces in an ultra-high-vacuum environment have led to the conclusion that they are bulk terminated at specific planes. 7,8 For Al-based QCs, the selected terminations are dense Al-rich planes of the bulk structure separated by the largest interplanar distances corresponding to the lowest surface energy terminations. Low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM) images reveal both the long-range quasiperiodic order and local atomic configurations corresponding to cluster building blocks used to described the bulk structure that are truncated by the surface plane. 9À12 Such termin...

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Section: Resultsmentioning

confidence: 99%

“…9,10 The DS motifs correspond to truncated Bergman clusters or truncated Mackay clusters with a central vacancy. 9,10 The tiling connecting the WF centers is called the τP1 tiling. 17 It has an edge length of 1.26 nm and consists of pentagons (P), stars (S), and rhombi (R) tiles.…”

Section: Resultsmentioning

confidence: 99%

Self-Organized Molecular Films with Long-Range Quasiperiodic Order

et al. 2014

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“…Hard-sphere surface planes have been extracted from bulk models and compared to data from imaging techniques. 10,11,13 These planes have been of importance in determining possible nucleation sites in recent adsorption experiments. 14,15 Substantial effort is now being put into using quasicrystal surfaces as growth templates.…”

Section: Introductionmentioning

confidence: 99%

“…3 The surface structure of this material has been identified and determined to be a termination of the bulk structure. [4][5][6][7][8][9][10][11][12] The local atomic configuration ͓see Fig. 1͑a͔͒ is best described with pentagonal dark stars, pentagons and flowers.…”

Section: Introductionmentioning

confidence: 99%

“…1͑a͔͒ is best described with pentagonal dark stars, pentagons and flowers. 10,11 This significant step towards understanding the surface structure is the result of close collaboration between theory and experiment over recent years. Hard-sphere surface planes have been extracted from bulk models and compared to data from imaging techniques.…”

Section: Introductionmentioning

confidence: 99%

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Copper adsorption on the fivefoldAl70Pd21Mn9quasicrystal surface

et al. 2005

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Recently we reported the formation of a quasiperiodic Cu thin film on the fivefold icosahedral Al-Pd-Mn quasicrystal using scanning tunneling microscopy, low energy electron diffraction, and Auger electron spectroscopy. Here we provide details pertaining to the growth, stability, and structure of this film. Structural information has been gained by LEED measurements carried out at 85 K. Cu atoms are organized periodically with a nearest-neighbor distance of 2.5±0.1 Å along the aperiodically spaced rows. Above 8 ML spontaneous mass transport resulting in island formation has been observed by STM. These observations point to ascending adatoms being responsible for the formation of 3D features. Finally, flashing the multilayer film to 570 K results in the desorption or diffusion of Cu into the bulk and the formation of five domains of a periodic structure. Disciplines Condensed Matter Physics | Metallurgy CommentsThis article is from Physical Review B 72 (2005) Recently we reported the formation of a quasiperiodic Cu thin film on the fivefold icosahedral Al-Pd-Mn quasicrystal using scanning tunneling microscopy, low energy electron diffraction, and Auger electron spectroscopy. Here we provide details pertaining to the growth, stability, and structure of this film. Structural information has been gained by LEED measurements carried out at 85 K. Cu atoms are organized periodically with a nearest-neighbor distance of 2.5± 0.1 Å along the aperiodically spaced rows. Above 8 ML spontaneous mass transport resulting in island formation has been observed by STM. These observations point to ascending adatoms being responsible for the formation of 3D features. Finally, flashing the multilayer film to 570 K results in the desorption or diffusion of Cu into the bulk and the formation of five domains of a periodic structure.

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