Giant and tunable anisotropy of nanoscale friction in graphene

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dc.creatorClara Muniz da Silva de Almeida
dc.creatorRodrigo Barbosa Capaz
dc.creatorRodrigo Prioli Menezes
dc.creatorBenjamin Fragneaud
dc.creatorLuiz Gustavo de Oliveira Lopes Cançado
dc.creatorRicardo Paupitz Barbosa dos Santos
dc.creatorDouglas Soares Galvão
dc.creatorMarcelo Antonio Barros De Cicco
dc.creatorMarcos Gonçalves de Menezes
dc.creatorCarlos Alberto Achete
dc.date.accessioned2025-03-31T17:14:48Z
dc.date.accessioned2025-09-09T01:21:00Z
dc.date.available2025-03-31T17:14:48Z
dc.date.issued2016
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipFAPERJ - Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulo
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1038/srep31569
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/1843/81134
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Aberto
dc.subjectGrafeno
dc.subjectAnisotropia
dc.subject.otherGraphene
dc.subject.otherMechanical and structural properties and devices
dc.titleGiant and tunable anisotropy of nanoscale friction in graphene
dc.typeArtigo de periódico
local.citation.epage9
local.citation.spage1
local.citation.volume6
local.description.resumoThe nanoscale friction between an atomic force microscopy tip and graphene is investigated using friction force microscopy (FFM). During the tip movement, friction forces are observed to increase and then saturate in a highly anisotropic manner. As a result, the friction forces in graphene are highly dependent on the scanning direction: under some conditions, the energy dissipated along the armchair direction can be 80% higher than along the zigzag direction. In comparison, for highly-oriented pyrolitic graphite (HOPG), the friction anisotropy between armchair and zigzag directions is only 15%. This giant friction anisotropy in graphene results from anisotropies in the amplitudes of flexural deformations of the graphene sheet driven by the tip movement, not present in HOPG. The effect can be seen as a novel manifestation of the classical phenomenon of Euler buckling at the nanoscale, which provides the non-linear ingredients that amplify friction anisotropy. Simulations based on a novel version of the 2D Tomlinson model (modified to include the effects of flexural deformations), as well as fully atomistic molecular dynamics simulations and first-principles density-functional theory (DFT) calculations, are able to reproduce and explain the experimental observations.
local.identifier.orcidhttps://orcid.org/0000-0001-5770-5026
local.identifier.orcidhttps://orcid.org/0000-0003-4004-0341
local.identifier.orcidhttps://orcid.org/0000-0001-8170-6117
local.identifier.orcidhttps://orcid.org/0000-0003-0816-0888
local.identifier.orcidhttps://orcid.org/0000-0003-1254-6353
local.identifier.orcidhttps://orcid.org/0000-0003-0145-8358
local.identifier.orcidhttps://orcid.org/0000-0001-6292-0134
local.identifier.orcidhttps://orcid.org/0000-0001-8143-0181
local.identifier.orcidhttps://orcid.org/0000-0002-4510-2698
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.nature.com/articles/srep31569#citeas

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