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A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip
Graphene demonstrates high potential as an atomically thin solid lubricant for sliding interfaces in industry. However, graphene as a coating material does not always exhibit strong adhesion to any substrates. When the adhesion of graphene to its substrate weakens, it remains unknown whether relativ...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9418518/ https://www.ncbi.nlm.nih.gov/pubmed/36133360 http://dx.doi.org/10.1039/c9na00660e |
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author | Fan, Na Guo, Jian Jing, Guangyin Liu, Cheng Wang, Qun Wu, Guiyong Jiang, Hai Peng, Bei |
author_facet | Fan, Na Guo, Jian Jing, Guangyin Liu, Cheng Wang, Qun Wu, Guiyong Jiang, Hai Peng, Bei |
author_sort | Fan, Na |
collection | PubMed |
description | Graphene demonstrates high potential as an atomically thin solid lubricant for sliding interfaces in industry. However, graphene as a coating material does not always exhibit strong adhesion to any substrates. When the adhesion of graphene to its substrate weakens, it remains unknown whether relative sliding at the interface exists and how the tribological properties of the graphene coating changes. In this work, we first designed a method to weaken the adhesion between graphene and its SiO(2) substrate. Then the graphene with weakened adhesion to its substrate was rubbed using an AFM tip, where we found a novel phenomenon: the monolayer graphene not only no longer protected the SiO(2) substrate from deformation and damage, but also prompted the formation of hillock-like structures with heights of approximately tens of nanometers. Moreover, the surface of the hillock-like structure exhibited very low adhesion and a continuously decreasing friction force versus sliding time. Comparing the hillock-like structure on the bare SiO(2) surface and the proposed force model, we demonstrated that the emergence of the hillock-like structure (with very low adhesion and continuously decreasing friction) was ascribed to the relative sliding at the graphene/substrate interface caused by the mechanical shear of the AFM tip. Our findings reveal a potential failure of the graphene coating when the adhesion strength between graphene and its substrate is damaged or weakened and provide a possibility for in situ fabrication of a low friction and adhesion micro/nanostructure on a SiO(2)/graphene surface. |
format | Online Article Text |
id | pubmed-9418518 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | RSC |
record_format | MEDLINE/PubMed |
spelling | pubmed-94185182022-09-20 A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip Fan, Na Guo, Jian Jing, Guangyin Liu, Cheng Wang, Qun Wu, Guiyong Jiang, Hai Peng, Bei Nanoscale Adv Chemistry Graphene demonstrates high potential as an atomically thin solid lubricant for sliding interfaces in industry. However, graphene as a coating material does not always exhibit strong adhesion to any substrates. When the adhesion of graphene to its substrate weakens, it remains unknown whether relative sliding at the interface exists and how the tribological properties of the graphene coating changes. In this work, we first designed a method to weaken the adhesion between graphene and its SiO(2) substrate. Then the graphene with weakened adhesion to its substrate was rubbed using an AFM tip, where we found a novel phenomenon: the monolayer graphene not only no longer protected the SiO(2) substrate from deformation and damage, but also prompted the formation of hillock-like structures with heights of approximately tens of nanometers. Moreover, the surface of the hillock-like structure exhibited very low adhesion and a continuously decreasing friction force versus sliding time. Comparing the hillock-like structure on the bare SiO(2) surface and the proposed force model, we demonstrated that the emergence of the hillock-like structure (with very low adhesion and continuously decreasing friction) was ascribed to the relative sliding at the graphene/substrate interface caused by the mechanical shear of the AFM tip. Our findings reveal a potential failure of the graphene coating when the adhesion strength between graphene and its substrate is damaged or weakened and provide a possibility for in situ fabrication of a low friction and adhesion micro/nanostructure on a SiO(2)/graphene surface. RSC 2020-04-10 /pmc/articles/PMC9418518/ /pubmed/36133360 http://dx.doi.org/10.1039/c9na00660e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Fan, Na Guo, Jian Jing, Guangyin Liu, Cheng Wang, Qun Wu, Guiyong Jiang, Hai Peng, Bei A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title | A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title_full | A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title_fullStr | A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title_full_unstemmed | A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title_short | A hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the SiO(2) substrate using an AFM tip |
title_sort | hillock-like phenomenon with low friction and adhesion on a graphene surface induced by relative sliding at the interface of graphene and the sio(2) substrate using an afm tip |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9418518/ https://www.ncbi.nlm.nih.gov/pubmed/36133360 http://dx.doi.org/10.1039/c9na00660e |
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