Thermally activated phenomena in nanoscopic sliding friction

Enrico Gnecco, Elisa Riedo, R. Bennewitz, E. Meyer, H. Brune

Research output: Contribution to journalArticle

Abstract

The role of thermal activation for a nanoasperity sliding on a flat surface with low speed is discussed. If the asperity slides in a vacuum, thermal vibrations may excite slipping from an equilibrium position to the next one along the sliding path. This effect is reduced if the velocity increases and leads to a logarithmic increase of friction with the sliding velocity. This is not always the case in a humid environment, where the formation of capillaries between tip and surface acts as an obstacle for thermally activated jumps. Depending on the wettability of the surface, different behaviors are observed.

Original languageEnglish (US)
Pages (from-to)169-174
Number of pages6
JournalTriboTest
Volume12
Issue number2
DOIs
StatePublished - Apr 1 2006

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Friction
Wetting
Chemical activation
Vacuum
Hot Temperature

Keywords

  • Atomic force microscopy
  • Humidity dependence of friction
  • Thermal activation
  • Velocity dependence of friction

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Gnecco, E., Riedo, E., Bennewitz, R., Meyer, E., & Brune, H. (2006). Thermally activated phenomena in nanoscopic sliding friction. TriboTest, 12(2), 169-174. https://doi.org/10.1002/tt.14

Thermally activated phenomena in nanoscopic sliding friction. / Gnecco, Enrico; Riedo, Elisa; Bennewitz, R.; Meyer, E.; Brune, H.

In: TriboTest, Vol. 12, No. 2, 01.04.2006, p. 169-174.

Research output: Contribution to journalArticle

Gnecco, E, Riedo, E, Bennewitz, R, Meyer, E & Brune, H 2006, 'Thermally activated phenomena in nanoscopic sliding friction', TriboTest, vol. 12, no. 2, pp. 169-174. https://doi.org/10.1002/tt.14
Gnecco, Enrico ; Riedo, Elisa ; Bennewitz, R. ; Meyer, E. ; Brune, H. / Thermally activated phenomena in nanoscopic sliding friction. In: TriboTest. 2006 ; Vol. 12, No. 2. pp. 169-174.
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