Superior Regularity in Erosion Patterns by Planar Subsurface Channeling

Redinger, Alex; Hansen, Henri; Linke, U.; Rosandi, Yudi; Urbassek, Herbert M.; Michely, Thomas

doi:10.1103/physrevlett.96.106103

Cited by 34 publications

(34 citation statements)

References 16 publications

(15 reference statements)

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“…Grazing incidence ions may enter at ascending steps into the crystal and may be guided over long distances away from the step, thereby obtaining less violent pathways for energy loss ͑e.g., electronic͒ and resulting in less sputtering. While we have previously shown 4,5 that subsurface channeling is of crucial importance for pattern formation, we will see below that it is also responsible for significant variations of Y step with the polar and azimuthal angle within the zone of influence and with temperature.…”

Section: Geometrical Modelmentioning

confidence: 99%

“…20 Step-edge diffusion is efficient at 550 K, keeping the visible structures compact. 5 Only the diffusion of vacancies created below the surface is still hampered, making annealing experiments necessary for the determination of their extent. 21 The MD simulation procedure for the calculation of the 83°data is briefly described in the following.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

“…2 results from subsurface channeling. 5 Ions hitting the ascending steps at the bottom of the step enter into the crystal with high probability and are guided in between the planar potentials of the first and the second layer. The ions oscillate between the two layers and will dechannel after they moved a distance dependent on surface temperature.…”

Section: Amentioning

confidence: 99%

“…The ability to create nanogrooves and ripple patterns [1][2][3][4][5][6] with tunable lateral periodicity and amplitude has several potential applications. The resulting morphology can be used as a template for the adsorption of large molecules, 7 for the manipulation of magnetism 8 or for tuning the chemical reactivity of catalytically active surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Step-edge sputtering through grazing incidence ions investigated by scanning tunneling microscopy and molecular dynamics simulations

et al. 2008

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Scanning tunneling microscopy is used to quantify step-edge sputtering of Pt͑111͒ at 550 K by grazing incidence ion bombardment with 5 keV Ar + ions. For bombardment conditions causing negligible erosion on terraces, damage features associated with step bombardment allow us to visualize step retraction and thus to quantify the step-edge sputtering yield. An alternative method for step-edge yield determination, which is applicable under more general conditions, is the analysis of the concentration of ascending steps together with the removed amount as a function of ion fluence. Interestingly, the azimuthal direction of the impinging ions with respect to the surface significantly changes the sputtering yield at step edges. This change is attributed to the orientation dependence of subsurface channeling. Atomistic insight into step-edge sputtering and its azimuthal dependence is given by molecular dynamics simulations of ion impacts at 0 and 550 K. The simulations also demonstrate a strong dependence of the step-edge sputtering yield on temperature.

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Section: Geometrical Modelmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Section: Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Step-edge sputtering through grazing incidence ions investigated by scanning tunneling microscopy and molecular dynamics simulations

et al. 2008

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“…If the ion scatters at a surface defect -such as an adsorbate or an adatom, or as in the present work, a surface step -a substantial amount of the ion energy may be transferred to the surface, inducing defect formation and sputtering. This mechanism has been investigated recently both by molecular-dynamics simulation and by experimental measurements based on scanning tunneling microscopy [1][2][3][4][5][6][7]. The phenomenon is of immediate interest to the field of the nanopatterning of thin films [8,9] with applications, e.g.…”

Section: Introductionmentioning

confidence: 99%

Competition of terrace and step-edge sputtering under oblique-incidence ion impact on a stepped Pt(111) surface

Rosandi

Redinger

Michely

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tUsing molecular-dynamics simulation, we study the sputtering of a Pt(1 1 1) surface under oblique and glancing incidence 5 keV Ar ions. For incidence angles larger than a critical angle # c , the projectile is reflected off the surface and the sputter yield is zero. We discuss the azimuth dependence of the critical angle # c with the help of the surface corrugation felt by the impinging ion. If a step exists on the surface, sputtering occurs also for glancing incidence # > # c . We demonstrate that for realistic step densities, the total sputtering of a stepped surface may be sizable even at glancing incidence.

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Anisotropic Nanoscale Wrinkling in Solid‐State Substrates

Giòrdano¹,

Mongeot²

2018

Advanced Materials

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Pattern formation induced by wrinkling is a very common phenomenon exhibited in soft-matter substrates. In all these systems, wrinkles develop in the presence of compressively stressed thin films lying on compliant substrates. Here, the controlled growth of self-organized nanopatterns exploiting a wrinkling instability on a solid-state substrate is demonstrated. Soda-lime glasses are modified in the surface layers by a defocused ion beam, which triggers the formation of a compressively stressed surface layer deprived of alkali ions. When the substrate is heated up near its glass transition temperature, the wrinkling instability boosts the growth rate of the pattern by about two orders of magnitude. High-aspect-ratio anisotropic ripples bound by faceted ridges are thus formed, which represent an optimal template for guiding the growth of large-area arrays of functional nanostructures. The engineering over large square centimeter areas of quasi-1D arrays of Au nanostripe dimers endowed with tunable plasmonic response, strong optical dichroism, and high electrical conductivity is demonstrated. These peculiar functionalities allow these large-area substrates to be exploited as active metamaterials in nanophotonics, biosensing, and optoelectronics.

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Superior Regularity in Erosion Patterns by Planar Subsurface Channeling

Cited by 34 publications

References 16 publications

Step-edge sputtering through grazing incidence ions investigated by scanning tunneling microscopy and molecular dynamics simulations

Step-edge sputtering through grazing incidence ions investigated by scanning tunneling microscopy and molecular dynamics simulations

Competition of terrace and step-edge sputtering under oblique-incidence ion impact on a stepped Pt(111) surface

Anisotropic Nanoscale Wrinkling in Solid‐State Substrates

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