Influence of terrace widths on Au(111) reconstruction

Chauraud, Dimitri; Durinck, J.; Drouet, M.; Vernisse, Loranne; Bonneville, J.; Coupeau, C.

doi:10.1103/physrevb.96.045410

Cited by 13 publications

(13 citation statements)

References 29 publications

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“…For the Au system, we caution that the finer details of the equilibrium shape, and no doubt of shape evolution, are complicated being impacted by the presence of a herringbone reconstruction of the Au(111) surface. 239 However, this does not appear to impact the basic features of evolution shown in Figure 30. For either of these systems, there has not been quantitative analysis of evolution.…”

Section: Reshaping For Convex 2d Epitaxial Ncs: Fcc(111) Homoepitaxial Systemsmentioning

confidence: 93%

Reshaping, Intermixing, and Coarsening for Metallic Nanocrystals: Nonequilibrium Statistical Mechanical and Coarse-Grained Modeling

et al. 2019

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Self-assembly of ensembles of supported 2D or 3D nanoclusters (NCs) by surface deposition, and of unsupported 3D NCs by solution-phase synthesis, produces intrinsically nonequilibrium systems. Individual nanoclusters can have far-from-equilibrium shapes and composition profiles. The free energy of the ensemble can be lowered by coarsening which can involve Ostwald ripening or Smoluchowski ripening (NC diffusion and coalescence). Preservation of individual NC structure and inhibition of coarsening is key for, e.g., avoiding catalyst degradation. In this review, we focus on crystalline metallic NCs. Atomistic-level modeling of equilibration processes typically utilizes stochastic lattice-gas models to access appropriate time-and length-scales. However, predictive modeling requires incorporation of realistic rates for relaxation mechanisms, e.g., periphery diffusion and intermixing, in numerous local environments (rather than the use of generic prescriptions). Alternative coarse-grained modeling must also incorporate appropriate mechanisms and kinetics. At the level of individual NCs, we present analyses of reshaping, including sintering and pinch-off, and of compositional evolution. We also discuss modeling of coarsening including diffusion and decay of individual NCs, and unconventional coarsening processes. We describe high-level modeling integrated with STM studies for 2D epitaxial NCs, and developments in modeling for supported and unsupported 3D NCs motivated by in situ TEM studies.

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Section: Reshaping For Convex 2d Epitaxial Ncs: Fcc(111) Homoepitaxial Systemsmentioning

confidence: 93%

Reshaping, Intermixing, and Coarsening for Metallic Nanocrystals: Nonequilibrium Statistical Mechanical and Coarse-Grained Modeling

et al. 2019

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“…3a induced by the high scanning rate needed to catch the anticrossing kinetics, the sequence of the images, which were taken at various durations after the dislocation emergence, clearly evidences the growth of the bridge. A well-known Au(111) reconstruction, called herringbone or chevron-like pattern [28][29][30][31], is seen in Fig. 3c (see the area on the right terrace on which the contrast has been enhanced).…”

Section: Resultsmentioning

confidence: 87%

Kinetics of anticrossing between slip traces and vicinal steps on crystal surfaces

et al. 2019

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“…This offers a useful alternative for growing nano-structures on Au (111) by allowing one to preferentially select the bulged elbow site for nucleation and growth. The herringbone reconstruction on Au(111) can be further modified by the width of the atomic terraces 25 . Hence, in principle, one could tailor the surface reconstruction by using vicinal surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The herringbone reconstruction on Au(111) can be further modified by the width of the atomic terraces. 25 Hence, in principle, one could tailor the surface reconstruction by using vicinal surfaces. Apart from the detailed reconstruction that occurs at the atomic scale, surface morphological changes at larger than micrometer scale can take place on Au(111) under certain experimental conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

Biased Ostwald Ripening in Site-Selective Growth of Two-Dimensional Gold Clusters

Rokni-Fard

Guo

2018

J. Phys. Chem. C

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Nucleation, growth and ripening of nanoscale Au islands formed on the Au (111) substrate have been investigated using variable temperature scanning tunnelling microscopy (VT-STM). The Au(111) surface consists of two types of naturally occurring dislocations. After deposition of Au atoms at 115 K, a single nano-meter-sized Au island is formed at each dislocation. Thermal annealing to 180 K causes gross mass transport in which Au atoms systematically move from one type of dislocation to the other. This leads to the preferential ripening of Au islands at one of the two types of dislocations, a phenomenon that has not been observed for any other metals deposited in Au(111). With repeated deposition and thermal annealing cycles, we have succeeded in obtaining two types of clusters with very different sizes: large clusters at the bulged elbow site and small clusters at the pinched elbow site.

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Influence of terrace widths on Au(111) reconstruction

Cited by 13 publications

References 29 publications

Reshaping, Intermixing, and Coarsening for Metallic Nanocrystals: Nonequilibrium Statistical Mechanical and Coarse-Grained Modeling

Reshaping, Intermixing, and Coarsening for Metallic Nanocrystals: Nonequilibrium Statistical Mechanical and Coarse-Grained Modeling

Kinetics of anticrossing between slip traces and vicinal steps on crystal surfaces

Biased Ostwald Ripening in Site-Selective Growth of Two-Dimensional Gold Clusters

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