About: Atomic structure affects the directional dependence of friction

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Friction between two objects can be understood by the making, stretching, and breaking of thousands of atomic-scale asperities. We have probed single atoms in a anisotropic surface [the H-terminated Si(100) surface] with a lateral force microscope operating in noncontact mode. We show that these forces are measurably different, depending upon the direction. Experimentally, these differences are observable in both the line proﬁles and the maximum stiffness values. Density functional theory calculations show a concerted motion of the whole Si dimer during the tip-sample interaction. These results demonstrate that on an asperity-by-asperity basis, the surface atomic structure plays a strong role in the directional dependence of friction. Friction between two objects can be understood by the making, stretching, and breaking of thousands of atomic-scale asperities. We have probed single atoms in a anisotropic surface [the H-terminated Si(100) surface] with a lateral force microscope operating in noncontact mode. We show that these forces are measurably different, depending upon the direction. Experimentally, these differences are observable in both the line proﬁles and the maximum stiffness values. Density functional theory calculations show a concerted motion of the whole Si dimer during the tip-sample interaction. These results demonstrate that on an asperity-by-asperity basis, the surface atomic structure plays a strong role in the directional dependence of friction. (en)
Title	Atomic structure affects the directional dependence of friction Atomic structure affects the directional dependence of friction (en)
skos:prefLabel	Atomic structure affects the directional dependence of friction Atomic structure affects the directional dependence of friction (en)
skos:notation	RIV/68378271:_____/13:00399525!RIV14-GA0-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GPP204/11/P578)
http://linked.open...iv/cisloPeriodika	12
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Jelínek, Pavel Ondráček, Martin Mutombo, Pingo
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	62451
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00399525
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	atomic scale friction; atomic force microscopy; silicon surface (en)
http://linked.open.../riv/klicoveSlovo	atomic scale friction silicon surface atomic force microscopy
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[3E875EC96BE8]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Ab-initio calculations for the interpretation of scanning-probe microscopy
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	111
http://linked.open...iv/tvurceVysledku	Jelínek, Pavel Weymouth, A. J. Ondráček, Martin Mutombo, Pingo Giessibl, F. J. Meuer, D. Wutscher, T.
http://linked.open...ain/vavai/riv/wos	000324542900011
issn	0031-9007
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.111.126103

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