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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...

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Autores principales: Fan, Na, Guo, Jian, Jing, Guangyin, Liu, Cheng, Wang, Qun, Wu, Guiyong, Jiang, Hai, Peng, Bei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
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.
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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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