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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la104497t
|2 doi
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|a eng
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|a Labuda, Aleksander
|e verfasserin
|4 aut
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|a Switching atomic friction by electrochemical oxidation
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 21.10.2014
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|a Date Revised 04.02.2014
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Friction between the sliding tip of an atomic force microscope and a gold surface changes dramatically upon electrochemical oxidation of the gold surface. Atomic-scale variations of the lateral force reveal details of the friction mechanisms. Stick-slip motion with atomic periodicity on perfect Au(111) terraces exhibits extremely low friction and almost no dependence on load. Significant friction is observed only above a load threshold at which wear of the surface is initiated. In contrast, irregular stick-slip motion and a linear increase of friction with load are observed on electrochemically oxidized surfaces. The observations are discussed with reference to the amorphous structure of the oxo-hydroxide surface and atomic place exchange mechanisms upon oxidation. Reversible, fast switching between the two states of friction has been achieved in both perchloric and sulfuric acid solutions
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|a Journal Article
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|a Hausen, Florian
|e verfasserin
|4 aut
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|a Gosvami, Nitya Nand
|e verfasserin
|4 aut
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| 700 |
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|a Grütter, Peter H
|e verfasserin
|4 aut
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|a Lennox, R Bruce
|e verfasserin
|4 aut
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| 700 |
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|a Bennewitz, Roland
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 6 vom: 15. März, Seite 2561-6
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