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Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation
NbO terminated Nb(110) and its oxidation are examined by scanning tunneling microscopy and spectroscopy (STS). The oxide structures are strongly influenced by the structural and electronic properties of the underlying NbO substrate. The NbO is terminated by one-dimensional few-nanometer nanocrystals...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7052221/ https://www.ncbi.nlm.nih.gov/pubmed/32123233 http://dx.doi.org/10.1038/s41598-020-60508-2 |
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author | Zhussupbekov, Kuanysh Walshe, Killian Bozhko, Sergey I. Ionov, Andrey Fleischer, Karsten Norton, Emma Zhussupbekova, Ainur Semenov, Valery Shvets, Igor V. Walls, Brian |
author_facet | Zhussupbekov, Kuanysh Walshe, Killian Bozhko, Sergey I. Ionov, Andrey Fleischer, Karsten Norton, Emma Zhussupbekova, Ainur Semenov, Valery Shvets, Igor V. Walls, Brian |
author_sort | Zhussupbekov, Kuanysh |
collection | PubMed |
description | NbO terminated Nb(110) and its oxidation are examined by scanning tunneling microscopy and spectroscopy (STS). The oxide structures are strongly influenced by the structural and electronic properties of the underlying NbO substrate. The NbO is terminated by one-dimensional few-nanometer nanocrystals, which form an ordered pattern. High-resolution STS measurements reveal that the nanocrystals and the regions between the nanocrystals exhibit different electronic characters. Low-dosage oxidation, sufficient for sub-monolayer coverage of the NbO, with subsequent UHV annealing results in the formation of resolved sub-nanometer clusters, positioned in-between the nanocrystals. Higher dosage oxidation results in the formation of a closed Nb(2)O(5−y) layer, which is confirmed by X-ray photoelectron spectroscopy measurements. The pentoxide is amorphous at the atomic-scale. However, large scale (tens of nanometers) structures are observed with their symmetry matching that of the underlying nanocrystals. |
format | Online Article Text |
id | pubmed-7052221 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-70522212020-03-06 Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation Zhussupbekov, Kuanysh Walshe, Killian Bozhko, Sergey I. Ionov, Andrey Fleischer, Karsten Norton, Emma Zhussupbekova, Ainur Semenov, Valery Shvets, Igor V. Walls, Brian Sci Rep Article NbO terminated Nb(110) and its oxidation are examined by scanning tunneling microscopy and spectroscopy (STS). The oxide structures are strongly influenced by the structural and electronic properties of the underlying NbO substrate. The NbO is terminated by one-dimensional few-nanometer nanocrystals, which form an ordered pattern. High-resolution STS measurements reveal that the nanocrystals and the regions between the nanocrystals exhibit different electronic characters. Low-dosage oxidation, sufficient for sub-monolayer coverage of the NbO, with subsequent UHV annealing results in the formation of resolved sub-nanometer clusters, positioned in-between the nanocrystals. Higher dosage oxidation results in the formation of a closed Nb(2)O(5−y) layer, which is confirmed by X-ray photoelectron spectroscopy measurements. The pentoxide is amorphous at the atomic-scale. However, large scale (tens of nanometers) structures are observed with their symmetry matching that of the underlying nanocrystals. Nature Publishing Group UK 2020-03-02 /pmc/articles/PMC7052221/ /pubmed/32123233 http://dx.doi.org/10.1038/s41598-020-60508-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zhussupbekov, Kuanysh Walshe, Killian Bozhko, Sergey I. Ionov, Andrey Fleischer, Karsten Norton, Emma Zhussupbekova, Ainur Semenov, Valery Shvets, Igor V. Walls, Brian Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title | Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title_full | Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title_fullStr | Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title_full_unstemmed | Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title_short | Oxidation of Nb(110): atomic structure of the NbO layer and its influence on further oxidation |
title_sort | oxidation of nb(110): atomic structure of the nbo layer and its influence on further oxidation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7052221/ https://www.ncbi.nlm.nih.gov/pubmed/32123233 http://dx.doi.org/10.1038/s41598-020-60508-2 |
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