Nanotribology under electrochemical conditions: influence of a copper (sub)monolayer deposited on single crystal electrodes on friction forces studied with atomic force microscopy

Michael Nielinger; Helmut Baltruschat

doi:10.1039/B706804B

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Physical Chemistry Chemical Physics

Issue 30, 2007

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Nanotribology under electrochemical conditions: influence of a copper (sub)monolayer deposited on single crystal electrodes on friction forces studied with atomic force microscopy

Michael Nielinger and Helmut Baltruschat

Phys. Chem. Chem. Phys., 2007, 9, 3965-3969

DOI: 10.1039/B706804B
Received 08 May 2007, Accepted 13 Jun 2007
First published on the web 28 Jun 2007

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Friction force measurements performed by means of an atomic force microscope (AFM) under electrochemical conditions on a pure Au(111) electrode surface and one modified with a foreign metal are presented; after deposition of a (sub)monolayer copper on a Au(111) single crystal electrode a large increase of the friction force is observed compared to the pure Au(111) electrode surface; the extent of the increase not only depends on the copper coverage, but also on the normal load and may be explained by a higher energy dissipation due to motion of the sulfate anions adsorbed on the copper atoms induced by the AFM tip.

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Physical Chemistry Chemical Physics

Nanotribology under electrochemical conditions: influence of a copper (sub)monolayer deposited on single crystal electrodes on friction forces studied with atomic force microscopy

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