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迷人的曲线：变形在石墨烯粘附与摩擦中所起的作用

Attractive curves: the role of deformations in adhesion and friction on graphene.

作者信息

Antonov P V, Restuccia P, Righi M C, Frenken J W M

机构信息

Advanced Research Center for Nanolithography Science Park 106 1098 XG Amsterdam Netherlands

Department of Physics and Astronomy, University of Bologna Viale Berti Pichat 6/2 40127 Bologna Italy

出版信息

Nanoscale Adv. 2022 Sep 14;4(19):4175-4184. doi: 10.1039/d2na00283c. eCollection 2022 Sep 27.

DOI:10.1039/d2na00283c
PMID:36285223
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9514564/
Abstract

Friction force microscopy measurements reveal a dramatic difference of a factor 3 between the friction forces experienced on single-monolayer graphene on top of oxidized and unoxidized copper substrates. We associate this difference with the strong and weak adhesion that the graphene experiences on these two substrates, respectively, but argue that it is too large to be ascribed either to a difference in contact area or to a difference in contact commensurability or even to a combination of these two effects. We use density functional theory to show a significant increase in the chemical reactivity of graphene when it is curved.

摘要

摩擦力显微镜测量结果显示，在氧化铜和未氧化铜衬底上的单层石墨烯所经历的摩擦力之间存在着显著的3倍差异。我们将这种差异分别与石墨烯在这两种衬底上所经历的强附着力和弱附着力联系起来，但认为这种差异太大，不能归因于接触面积的差异、接触可公度性的差异，甚至不能归因于这两种效应的组合。我们使用密度泛函理论表明，石墨烯弯曲时其化学反应性会显著增加。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/fd19726a0cdf/d2na00283c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/3f20052c9f26/d2na00283c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/906606f7334a/d2na00283c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/0482f18aed0d/d2na00283c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/ef17fa979f00/d2na00283c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/2e261cf79b19/d2na00283c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/893ee9abafa6/d2na00283c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/9b72116ebb9d/d2na00283c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/fd19726a0cdf/d2na00283c-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/3f20052c9f26/d2na00283c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/906606f7334a/d2na00283c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/0482f18aed0d/d2na00283c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/ef17fa979f00/d2na00283c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/2e261cf79b19/d2na00283c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/893ee9abafa6/d2na00283c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/9b72116ebb9d/d2na00283c-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/13cb/9514564/fd19726a0cdf/d2na00283c-f8.jpg

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Altering the Properties of Graphene on Cu(111) by Intercalation of Potassium Bromide.
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