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Frontiers in Scanning Probe Microscopy

SPMW Mechanisms of atomic friction studied by friction force microscopy

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Contributor(s) Ernst Meyer
University of Basel, Switzerland
Abstract Force microscopy is a versatile instrument to investigate physical phenomena on surfaces. The first emphasis is on the study of friction on the nanometer-scale, also called nanotribology. It will be shown that atomic-scale stick-slip is relatively well understood, where the dependence on velocity and normal force is experimentally investigated and interpreted in terms of an extended Tomlinson model. It is essential to include thermal actuation to understand the observed phenomena. The transition from atomic-scale stick slip to continuous sliding will be described [1]. The detailed analysis yields the energy corrugation and the lateral contact stiffness as a function of load. It is found that continuum mechanics is not anymore valid at these dimensions. Recently, it has been shown that atomic friction can be controlled with rather high accuracy by electrostatic actuation [2]. In the second part the phenomenon non-contact friction is studied by ultra-sensitive cantilevers in the pendulum geometry, where forces in the atto-newton regime are accessible [3].
References
  1. A. Socoliuc, R. Bennewitz, E. Gnecco and E. Meyer, Transition from Stick-Slip to Continuous Sliding in Atomic Friction: Entering a New Regime of Ultra-low Friction, Phys. Rev. Lett. 92, 134301-1 (2004).
  2. A. Socoliuc, S. Maier, O. Pfeiffer,E. Gnecco, A. Baratoff, R. Bennewitz and E. Meyer, Atomic-Scale Control of Friction by Actuation of Nanometer-Sized Contacts" Science, 313, 207, July 14 (2006).
  3. S. Rast, P. Ruff, U. Gysin. C. Gerber, E. Meyer and D.W. Lee, Force microscopy experiments with ultra-sensitive cantilevers, Nanotechnology, 17, S189 (2006).
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  • Meyer, Ernst (2007), "SPMW Mechanisms of atomic friction studied by friction force microscopy," http://www.nanohub.org/resources/2102/.

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Date posted 13 Jan, 2007
Time 01:40 PM, October 04, 2006
Location Burton Morgan Building, Room 121
Type Online Presentations
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  • 10.0 Ranking Workshops Part of: Frontiers in Scanning Probe Microscopy

    Frontiers in Scanning Probe Microscopy

    Type Workshops
    Date 12 Feb, 2007
    Avg. Rating 0.0 out of 5 stars  (0)
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    From October 4- 6, 2006 the Birck Nanotechnology Center at Purdue University hosted a three day focused workshop on cutting edge SPM techniques that are under development throughout the world. The three day workshop featured thematically arranged invited talks. The workshop themes are …

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