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Stick–slip behaviour on Au(111) with adsorption of copper and sulfate
Several transitions in the friction coefficient with increasing load are found on Au(111) in sulfuric acid electrolyte containing Cu ions when a monolayer (or submonolayer) of Cu is adsorbed. At the corresponding normal loads, a transition to double or multiple slips in stick–slip friction is observ...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4419595/ https://www.ncbi.nlm.nih.gov/pubmed/25977853 http://dx.doi.org/10.3762/bjnano.6.85 |
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author | Podgaynyy, Nikolay Wezisla, Sabine Molls, Christoph Iqbal, Shahid Baltruschat, Helmut |
author_facet | Podgaynyy, Nikolay Wezisla, Sabine Molls, Christoph Iqbal, Shahid Baltruschat, Helmut |
author_sort | Podgaynyy, Nikolay |
collection | PubMed |
description | Several transitions in the friction coefficient with increasing load are found on Au(111) in sulfuric acid electrolyte containing Cu ions when a monolayer (or submonolayer) of Cu is adsorbed. At the corresponding normal loads, a transition to double or multiple slips in stick–slip friction is observed. The stick length in this case corresponds to multiples of the lattice distance of the adsorbed sulfate, which is adsorbed in a √3 × √7 superstructure on the copper monolayer. Stick–slip behaviour for the copper monolayer as well as for 2/3 coverage can be observed at F(N) ≥ 15 nN. At this normal load, a change from a small to a large friction coefficient occurs. This leads to the interpretation that the tip penetrates the electrochemical double layer at this point. At the potential (or point) of zero charge (pzc), stick–slip resolution persists at all normal forces investigated. |
format | Online Article Text |
id | pubmed-4419595 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-44195952015-05-14 Stick–slip behaviour on Au(111) with adsorption of copper and sulfate Podgaynyy, Nikolay Wezisla, Sabine Molls, Christoph Iqbal, Shahid Baltruschat, Helmut Beilstein J Nanotechnol Full Research Paper Several transitions in the friction coefficient with increasing load are found on Au(111) in sulfuric acid electrolyte containing Cu ions when a monolayer (or submonolayer) of Cu is adsorbed. At the corresponding normal loads, a transition to double or multiple slips in stick–slip friction is observed. The stick length in this case corresponds to multiples of the lattice distance of the adsorbed sulfate, which is adsorbed in a √3 × √7 superstructure on the copper monolayer. Stick–slip behaviour for the copper monolayer as well as for 2/3 coverage can be observed at F(N) ≥ 15 nN. At this normal load, a change from a small to a large friction coefficient occurs. This leads to the interpretation that the tip penetrates the electrochemical double layer at this point. At the potential (or point) of zero charge (pzc), stick–slip resolution persists at all normal forces investigated. Beilstein-Institut 2015-03-26 /pmc/articles/PMC4419595/ /pubmed/25977853 http://dx.doi.org/10.3762/bjnano.6.85 Text en Copyright © 2015, Podgaynyy et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Full Research Paper Podgaynyy, Nikolay Wezisla, Sabine Molls, Christoph Iqbal, Shahid Baltruschat, Helmut Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title | Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title_full | Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title_fullStr | Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title_full_unstemmed | Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title_short | Stick–slip behaviour on Au(111) with adsorption of copper and sulfate |
title_sort | stick–slip behaviour on au(111) with adsorption of copper and sulfate |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4419595/ https://www.ncbi.nlm.nih.gov/pubmed/25977853 http://dx.doi.org/10.3762/bjnano.6.85 |
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