Dispersed Forces from Measured Shape Anisotropy of Adatom Islands: Revelations from an Accelerated Simulation Scheme

Rabbering, Frits; Kara, Abdelkader; Wormeester, Herbert; Warnaar, Teun; Trushin, Oleg; Rahman, Talat S.; Poelsema, Bene

doi:10.1103/physrevlett.103.096105

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…In this paper we propose a system; namely, submonolayer deposition on a tube, where this transition can be investigated. Submonolayer growth is a prototypical nonequilibrium system exhibiting critical behavior, which has been studied extensively both experimentally [3][4][5][6] and theoretically [7][8][9][10][11][12][13]. In this process, particles deposited on a substrate diffuse and aggregate to form islands.…”

Section: Introductionmentioning

confidence: 99%

Dimensionality transition in submonolayer growth on carbon nanotubes

et al. 2014

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We report on the transition from two-dimensional to one-dimensional (1D) behavior observed in submonolayer deposition on a tubular substrate. Using kinetic Monte Carlo simulations we show that the island density increases when the tube diameter decreases, approaching the 1D behavior. This increase is confirmed by experiments of FePt nanoparticle deposition on carbon nanotubes. Kinetic Monte Carlo simulations also indicate that the consequences of confinement sharply disappear when the perimeter of the tube is slightly larger than the distance between islands.

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Section: Introductionmentioning

confidence: 99%

Dimensionality transition in submonolayer growth on carbon nanotubes

et al. 2014

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“…However, the deposition process usually incorporates downward funneling (DF) of atoms deposited at step edges to adsorption sites in lower layers [4,5]. There may also be steering towards any steep sides of multilayer nanoprotrusions [6,7] or shadowing for oblique incidence [8].…”

Section: Introductionmentioning

confidence: 99%

From Initial to Late Stages of Epitaxial Thin Film Growth: STM Analysis and Atomistic or Coarse-Grained Modeling

Evans¹,

Han²,

Ünal³

et al. 2010

AIP Conference Proceedings

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Epitaxial thin film growth by vapor deposition or molecular beam epitaxy under ultra-high vacuum conditions generally occurs in two stages: (i) nucleation and growth of well-separated islands on the substrate; (ii) subsequent formation of a thicker continuous film with possible kinetic roughening. For homoepitaxial growth, two-dimensional (2D) monolayer islands are formed during submonolayer deposition. Typically, the presence of a step-edge barrier inhibits downward transport and leads to the formation of mounds (multilayer stacks of 2D islands) during multilayer growth. For heteroepitaxial growth, islands formed in the initial stages of deposition sometimes have a 2D monolayer structure. However, they may instead exhibit bilayer or 3D multilayer structure due to, e.g., a high film surface energy, strain, or quantum size effects. Various growth modes are possible for thicker films. Atomistic modeling provides the most detailed picture of film growth. For coherent (defect-free) epitaxial films, lattice-gas modeling analyzed by kinetic Monte Carlo simulation (KMC) is particularly successful in describing film growth on the appropriate time and length scales. For large islands or complex systems, another effective and instructive approach is laterally coarse-grained step-dynamics modelingwhich tracks only the evolution of step edges in each layer. However, fully coarse-grained 3D continuum modeling for the evolution of a film height function does not yet have predictive capability. Examples are provided for: Ag homoepitaxy on (100), (111) and (110) Abstract. Epitaxial thin film growth by vapor deposition or molecular beam epitaxy under ultra-high vacuum conditions generally occurs in two stages: (i) nucleation and growth of well-separated islands on the substrate; (ii) subsequent formation of a thicker continuous film with possible kinetic roughening. For homoepitaxial growth, two-dimensional (2D) monolayer islands are formed during submonolayer deposition. Typically, the presence of a step-edge barrier inhibits downward transport and leads to the formation of mounds (multilayer stacks of 2D islands) during multilayer growth. For heteroepitaxial growth, islands formed in the initial stages of deposition sometimes have a 2D monolayer structure. However, they may instead exhibit bilayer or 3D multilayer structure due to, e.g., a high film surface energy, strain, or quantum size effects. Various growth modes are possible for thicker films. Atomistic modeling provides the most detailed picture of film growth. For coherent (defect-free) epitaxial films, lattice-gas modeling analyzed by kinetic Monte Carlo simulation (KMC) is particularly successful in describing film growth on the appropriate time and length scales. For large islands or complex systems, another effective and instructive approach is laterally coarse-grained step-dynamics modeling which tracks only the evolution of step edges in each layer. However, fully coarse-grained 3D continuum modeling for the evolution of a film height function does not ...

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“…The interaction-potential was modeled by a modified Lennard-Jones potential (eq. 7.1), as described by Rabbering et al [80]. Its strength was found by comparison with experimental data.…”

Section: Resultsmentioning

confidence: 69%

Characterization of nanometre-scale patterns on Cu(001) and Ag(001) by means of optical spectroscopy and high-resolution electron diffraction

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Dispersed Forces from Measured Shape Anisotropy of Adatom Islands: Revelations from an Accelerated Simulation Scheme

Cited by 6 publications

References 21 publications

Dimensionality transition in submonolayer growth on carbon nanotubes

Dimensionality transition in submonolayer growth on carbon nanotubes

From Initial to Late Stages of Epitaxial Thin Film Growth: STM Analysis and Atomistic or Coarse-Grained Modeling

Characterization of nanometre-scale patterns on Cu(001) and Ag(001) by means of optical spectroscopy and high-resolution electron diffraction

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