Gosvami, NN and Filleter, T and Egberts, P and Bennewitz, R (2010) Microscopic Friction Studies on Metal Surfaces. In: TRIBOLOGY LETTERS. (pp. 19 - 24). SPRINGER/PLENUM PUBLISHERS
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Abstract
Atomically flat and clean metal surfaces exhibit a regime of ultra-low friction at low normal loads. Atomic force microscopy, performed in ultra-high vacuum on Cu(100) and Au(111) surfaces, reveals a clear stick-slip modulation in the lateral force but almost zero dissipation. Significant friction is observed only for higher loads (similar to 4-6 nN above the pull-off force) together with the onset of wear. We discuss the minor role of thermal activation in the low friction regime and suggest that a compliant metallic neck between tip and surface is formed which brings upon the low, load-independent shear stress.
| Type: | Proceedings paper |
|---|---|
| Title: | Microscopic Friction Studies on Metal Surfaces |
| Event: | 428th Wilhelm and Else Heraeus Seminar on Physics of Tribology - Understanding Friction and Wear in Technical Systems |
| Location: | Bad Honnef, GERMANY |
| Dates: | 2009-03-23 - 2009-03-25 |
| DOI: | 10.1007/s11249-009-9508-5 |
| Keywords: | Nanotribology, Stick-slip, Atomic force microscopy (AFM), ATOMIC-SCALE FRICTION, SLIDING FRICTION, TRIBOLOGY, NANOINDENTATION, CONTACT, AU(111), MEMS |
| UCL classification: | UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry |
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