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2022-09-28Zeitschriftenartikel DOI: 10.18452/25511
At Least 10-fold Higher Lubricity of Molecularly Thin D2O vs H2O Films at Single-Layer Graphene−Mica Interfaces
dc.contributor.authorLin, Hu
dc.contributor.authorHabibova, Lala
dc.contributor.authorRauf, Abdul
dc.contributor.authorGonzález, José D. Cojal
dc.contributor.authorSeverin, Nikolai
dc.contributor.authorKirstein, Stefan
dc.contributor.authorSokolov, Igor M.
dc.contributor.authorRabe, Jürgen P.
dc.date.accessioned2022-11-23T12:56:44Z
dc.date.available2022-11-23T12:56:44Z
dc.date.issued2022-09-28none
dc.identifier.other10.1021/acs.nanolett.2c01425
dc.identifier.urihttp://edoc.hu-berlin.de/18452/26194
dc.description.abstractInterfacial water is a widespread lubricant down to the nanometer scale. We investigate the lubricities of molecularly thin H2O and D2O films confined between mica and graphene, via the relaxation of initially applied strain in graphene employing Raman spectroscopy. Surprisingly, the D2O films are at least 1 order of magnitude more lubricant than H2O films, despite the similar bulk viscosities of the two liquids. We propose a mechanism based on the known selective permeation of protons vs deuterons through graphene. Permeated protons and left behind hydroxides may form ion pairs clamping across the graphene sheet and thereby hindering the graphene from sliding on the water layer. This explains the lower lubricity but also the hindering diffusivity of the water layer, which yields a high effective viscosity in accordance with findings in dewetting experiments. Our work elucidates an unexpected effect and provides clues to the behavior of graphene on hydrous surfaces.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY-NC-ND 4.0) Attribution-NonCommercial-NoDerivatives 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectwatereng
dc.subjectsheareng
dc.subjectviscosityeng
dc.subjectproton permeationeng
dc.subjectfilteringeng
dc.subjecttribologyeng
dc.subject.ddc530 Physiknone
dc.titleAt Least 10-fold Higher Lubricity of Molecularly Thin D2O vs H2O Films at Single-Layer Graphene−Mica Interfacesnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/26194-7
dc.identifier.doihttp://dx.doi.org/10.18452/25511
dc.type.versionpublishedVersionnone
local.edoc.container-titleNano lettersnone
local.edoc.pages7none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionMathematisch-Naturwissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameACS Publ.none
local.edoc.container-publisher-placeWashington, DCnone
local.edoc.container-volume22
local.edoc.container-issue19none
local.edoc.container-year2022
local.edoc.container-firstpage7761none
local.edoc.container-lastpage7767none
dc.description.versionPeer Reviewednone
dc.identifier.eissn1530-6992

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