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Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth

If a material grows on another material with a largely different lattice constant, which of the two adapts for an energetically favorable growth? To tackle this question, we investigate the growth of Ag on Cu(111) by variable temperature scanning tunneling microscopy. The structures grown between 12...

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Detalles Bibliográficos
Autores principales: Sprodowski, Carsten, Morgenstern, Karina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566144/
https://www.ncbi.nlm.nih.gov/pubmed/31067792
http://dx.doi.org/10.3390/nano9050710
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author Sprodowski, Carsten
Morgenstern, Karina
author_facet Sprodowski, Carsten
Morgenstern, Karina
author_sort Sprodowski, Carsten
collection PubMed
description If a material grows on another material with a largely different lattice constant, which of the two adapts for an energetically favorable growth? To tackle this question, we investigate the growth of Ag on Cu(111) by variable temperature scanning tunneling microscopy. The structures grown between 120 and 170 K are remarkably different from those grown between 200 and 340 K. The low-temperature structure is rectangular-like and consists of stacked rods, 7 to 8 Ag atoms long, which form a superstructure without long-range order. This structure covers the whole surface prior to nucleation of further layers. The high-temperature structure is hexagonal and consists of misfit dislocations forming 8 × 8 to 10 × 10 superstructures. For this structure, second layer nucleation sets in far before the closure of the first monolayer. While both structures are driven by the large lattice misfit between the two materials, the growing Ag layer adapts to the Cu surface at low temperature, while the Cu surface adapts to the growing Ag layer at higher temperature.
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spelling pubmed-65661442019-06-17 Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth Sprodowski, Carsten Morgenstern, Karina Nanomaterials (Basel) Article If a material grows on another material with a largely different lattice constant, which of the two adapts for an energetically favorable growth? To tackle this question, we investigate the growth of Ag on Cu(111) by variable temperature scanning tunneling microscopy. The structures grown between 120 and 170 K are remarkably different from those grown between 200 and 340 K. The low-temperature structure is rectangular-like and consists of stacked rods, 7 to 8 Ag atoms long, which form a superstructure without long-range order. This structure covers the whole surface prior to nucleation of further layers. The high-temperature structure is hexagonal and consists of misfit dislocations forming 8 × 8 to 10 × 10 superstructures. For this structure, second layer nucleation sets in far before the closure of the first monolayer. While both structures are driven by the large lattice misfit between the two materials, the growing Ag layer adapts to the Cu surface at low temperature, while the Cu surface adapts to the growing Ag layer at higher temperature. MDPI 2019-05-07 /pmc/articles/PMC6566144/ /pubmed/31067792 http://dx.doi.org/10.3390/nano9050710 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sprodowski, Carsten
Morgenstern, Karina
Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title_full Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title_fullStr Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title_full_unstemmed Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title_short Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth
title_sort temperature-dependent accommodation of two lattices of largely different size during growth
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566144/
https://www.ncbi.nlm.nih.gov/pubmed/31067792
http://dx.doi.org/10.3390/nano9050710
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