Lead adsorption on the Al13Co4(100) surface: heterogeneous nucleation and pseudomorphic growth
Identifieur interne : 002564 ( Main/Exploration ); précédent : 002563; suivant : 002565Lead adsorption on the Al13Co4(100) surface: heterogeneous nucleation and pseudomorphic growth
Auteurs : R. Addou [France] ; A K Shukla [France] ; S. Alarcn Villaseca [France] ; Gaudry [France] ; Th Deniozou [France] ; M. Heggen [Allemagne] ; M. Feuerbacher [Allemagne] ; R. Widmer [Suisse] ; O. Grning [Suisse] ; V. Fourne [France] ; J-M Dubois [France] ; J. Ledieu [France]Source :
- New Journal of Physics [ 1367-2630 ] ; 2011-10.
English descriptors
- Teeft :
- Adatoms, Additional layers, Adsorbate, Adsorption, Adsorption energies, Adsorption site, Adsorption study, Aperiodic surfaces, Area ratio, Bipentagonal, Bipentagonal motif, Bipentagonal motifs, Bipentagonal pattern, Bipentagonal patterns, Brightest features, Bulk model, Clean surface, Computational details, Core level, Core level lineshape, Core level spectra, Crucial role, Decagonal quasicrystal, Defect sites, Deposition, Different sites, Diffraction pattern, Dynamical leed, Edge lengths, Fractional area, Further deposition, Glue atoms, Growth mode, Gure, Heterogeneous nucleation, Hollow site, Hollow sites, Initio, Initio calculations, Irregular pentagons, Lattice parameter, Lattice parameters, Leed, Leed measurements, Leed pattern, Leed patterns, Motif, Nucleation, Orthorhombic unit cell, Parallel lines, Pentagonal, Pentagonal clusters, Pentagonal features, Pentagonal islands, Photoelectron spectroscopy, Phys, Preferential nucleation site, Pseudomorphic, Pseudomorphic growth mode, Quasicrystal, Quasicrystalline, Quasicrystalline surface, Quasiperiodic, Relative adsorption energies, Room temperature, Same peak height, Same region, Second layer, Second layer growth, Similar behaviour, Single step height, Structural details, Structural model, Structural quality, Substrate signal, Successive terraces, Surface models, Surface plane, Surface relaxation, Surface structure, Surface unit cell, Topmost, Topmost layer, Unit cell, Unit cell dimensions, Vefold surface, Weak interaction, White pentagons.
Abstract
We have investigated the adsorption of Pb atoms on the (100) surface of an orthorhombic Al13Co4 crystal at 300 and 573K substrate temperatures. This complex metallic alloy is an approximant to the decagonal AlNiCo quasicrystal. At submonolayer coverage and at 300K, Pb adatoms remain highly mobile and adsorb preferentially within the hollow site situated in between adjacent Al pentagonal clusters present at the surface. These experimental findings are supported by ab initio calculations based on density functional theory (DFT). For both temperature regimes, Pb adsorption leads to the formation of pseudomorphic monolayers above which the high adsorbate mobility prohibits the growth of additional layers. For the high-temperature deposition, we propose a structural model for the Pb film and discuss its relationship with the underneath substrate.
Url:
DOI: 10.1088/1367-2630/13/10/103011
Affiliations:
- Allemagne, France, Suisse
- District de Cologne, Grand Est, Lorraine (région), Rhénanie-du-Nord-Westphalie
- Juliers, Nancy
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Ledieu</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Institut Jean Lamour (UMR 7198 CNRS-Nancy-Universit-UPV-Metz), Ecole des Mines, Parc de Saurupt, 54042 Nancy Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">France</country></affiliation></author></analytic><monogr></monogr><series><title level="j">New Journal of Physics</title><idno type="eISSN">1367-2630</idno><imprint><publisher>IOP Publishing</publisher><date type="published" when="2011-10">2011-10</date><biblScope unit="volume">13</biblScope><biblScope unit="issue">10</biblScope></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Adatoms</term><term>Additional layers</term><term>Adsorbate</term><term>Adsorption</term><term>Adsorption energies</term><term>Adsorption site</term><term>Adsorption study</term><term>Aperiodic surfaces</term><term>Area ratio</term><term>Bipentagonal</term><term>Bipentagonal motif</term><term>Bipentagonal motifs</term><term>Bipentagonal pattern</term><term>Bipentagonal patterns</term><term>Brightest features</term><term>Bulk model</term><term>Clean surface</term><term>Computational details</term><term>Core level</term><term>Core level lineshape</term><term>Core level spectra</term><term>Crucial role</term><term>Decagonal quasicrystal</term><term>Defect sites</term><term>Deposition</term><term>Different sites</term><term>Diffraction pattern</term><term>Dynamical leed</term><term>Edge lengths</term><term>Fractional area</term><term>Further deposition</term><term>Glue atoms</term><term>Growth mode</term><term>Gure</term><term>Heterogeneous nucleation</term><term>Hollow site</term><term>Hollow sites</term><term>Initio</term><term>Initio calculations</term><term>Irregular pentagons</term><term>Lattice parameter</term><term>Lattice parameters</term><term>Leed</term><term>Leed measurements</term><term>Leed pattern</term><term>Leed patterns</term><term>Motif</term><term>Nucleation</term><term>Orthorhombic unit cell</term><term>Parallel lines</term><term>Pentagonal</term><term>Pentagonal clusters</term><term>Pentagonal features</term><term>Pentagonal islands</term><term>Photoelectron spectroscopy</term><term>Phys</term><term>Preferential nucleation site</term><term>Pseudomorphic</term><term>Pseudomorphic growth mode</term><term>Quasicrystal</term><term>Quasicrystalline</term><term>Quasicrystalline surface</term><term>Quasiperiodic</term><term>Relative adsorption energies</term><term>Room temperature</term><term>Same peak height</term><term>Same region</term><term>Second layer</term><term>Second layer growth</term><term>Similar behaviour</term><term>Single step height</term><term>Structural details</term><term>Structural model</term><term>Structural quality</term><term>Substrate signal</term><term>Successive terraces</term><term>Surface models</term><term>Surface plane</term><term>Surface relaxation</term><term>Surface structure</term><term>Surface unit cell</term><term>Topmost</term><term>Topmost layer</term><term>Unit cell</term><term>Unit cell dimensions</term><term>Vefold surface</term><term>Weak interaction</term><term>White pentagons</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">We have investigated the adsorption of Pb atoms on the (100) surface of an orthorhombic Al13Co4 crystal at 300 and 573K substrate temperatures. This complex metallic alloy is an approximant to the decagonal AlNiCo quasicrystal. At submonolayer coverage and at 300K, Pb adatoms remain highly mobile and adsorb preferentially within the hollow site situated in between adjacent Al pentagonal clusters present at the surface. These experimental findings are supported by ab initio calculations based on density functional theory (DFT). For both temperature regimes, Pb adsorption leads to the formation of pseudomorphic monolayers above which the high adsorbate mobility prohibits the growth of additional layers. For the high-temperature deposition, we propose a structural model for the Pb film and discuss its relationship with the underneath substrate.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>France</li><li>Suisse</li></country><region><li>District de Cologne</li><li>Grand Est</li><li>Lorraine (région)</li><li>Rhénanie-du-Nord-Westphalie</li></region><settlement><li>Juliers</li><li>Nancy</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Addou, R" sort="Addou, R" uniqKey="Addou R" first="R" last="Addou">R. Addou</name></region><name sortKey="Alarcn Villaseca, S" sort="Alarcn Villaseca, S" uniqKey="Alarcn Villaseca S" first="S" last="Alarcn Villaseca">S. Alarcn Villaseca</name><name sortKey="Deniozou, Th" sort="Deniozou, Th" uniqKey="Deniozou T" first="Th" last="Deniozou">Th Deniozou</name><name sortKey="Dubois, J M" sort="Dubois, J M" uniqKey="Dubois J" first="J-M" last="Dubois">J-M Dubois</name><name sortKey="Fourne, V" sort="Fourne, V" uniqKey="Fourne V" first="V" last="Fourne">V. Fourne</name><name sortKey="Gaudry" sort="Gaudry" uniqKey="Gaudry" first="" last="Gaudry">Gaudry</name><name sortKey="Ledieu, J" sort="Ledieu, J" uniqKey="Ledieu J" first="J" last="Ledieu">J. Ledieu</name><name sortKey="Ledieu, J" sort="Ledieu, J" uniqKey="Ledieu J" first="J" last="Ledieu">J. Ledieu</name><name sortKey="Shukla, A K" sort="Shukla, A K" uniqKey="Shukla A" first="A K" last="Shukla">A K Shukla</name></country><country name="Allemagne"><region name="Rhénanie-du-Nord-Westphalie"><name sortKey="Heggen, M" sort="Heggen, M" uniqKey="Heggen M" first="M" last="Heggen">M. Heggen</name></region><name sortKey="Feuerbacher, M" sort="Feuerbacher, M" uniqKey="Feuerbacher M" first="M" last="Feuerbacher">M. Feuerbacher</name></country><country name="Suisse"><noRegion><name sortKey="Widmer, R" sort="Widmer, R" uniqKey="Widmer R" first="R" last="Widmer">R. Widmer</name></noRegion><name sortKey="Grning, O" sort="Grning, O" uniqKey="Grning O" first="O" last="Grning">O. Grning</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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