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Negative friction coefficients

Negative friction coefficients correspondence To the editor — Deng et al. recently although the two systems are fundamentally e s Th econd example involves the reported that the friction force between different (further details are given in the interaction between silica surfaces coated the tip of an atomic force microscope Supplementary Information). with a hydrophobic, cationic diblock 3,4 and a graphite surface increases with copolymer by means of electrostatic decreasing load. This phenomenon — anchoring. Figure 1b shows that, ae ft r which is described as a curve with a an initial jump to high friction resulting negative slope when the friction force is from adhesive contact, an almost linear plotted against load, and thus leads to a increase in the friction force develops with so-called negative friction coefficient — was increasing load. As the load is reduced, explained by a model where the adhesion however, the friction force first increases Decreasing between the atomic force microscope tip and then levels off until the surfaces pull load and the graphite surface is stronger than free from each other. In this case, a negative the dispersion forces holding the layers in friction coefficient appears because the Increasing graphite together . Here, by way of two intermolecular interactions between http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Materials Springer Journals

Negative friction coefficients

Nature Materials , Volume 12 (6) – May 22, 2013

Negative friction coefficients

Abstract

correspondence To the editor — Deng et al. recently although the two systems are fundamentally e s Th econd example involves the reported that the friction force between different (further details are given in the interaction between silica surfaces coated the tip of an atomic force microscope Supplementary Information). with a hydrophobic, cationic diblock 3,4 and a graphite surface increases with copolymer by means of electrostatic decreasing load. This...
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References (5)

Publisher
Springer Journals
Copyright
Copyright © 2013 by Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.
Subject
Materials Science; Materials Science, general; Optical and Electronic Materials; Biomaterials; Nanotechnology; Condensed Matter Physics
ISSN
1476-1122
eISSN
1476-4660
DOI
10.1038/nmat3656
Publisher site
See Article on Publisher Site

Abstract

correspondence To the editor — Deng et al. recently although the two systems are fundamentally e s Th econd example involves the reported that the friction force between different (further details are given in the interaction between silica surfaces coated the tip of an atomic force microscope Supplementary Information). with a hydrophobic, cationic diblock 3,4 and a graphite surface increases with copolymer by means of electrostatic decreasing load. This phenomenon — anchoring. Figure 1b shows that, ae ft r which is described as a curve with a an initial jump to high friction resulting negative slope when the friction force is from adhesive contact, an almost linear plotted against load, and thus leads to a increase in the friction force develops with so-called negative friction coefficient — was increasing load. As the load is reduced, explained by a model where the adhesion however, the friction force first increases Decreasing between the atomic force microscope tip and then levels off until the surfaces pull load and the graphite surface is stronger than free from each other. In this case, a negative the dispersion forces holding the layers in friction coefficient appears because the Increasing graphite together . Here, by way of two intermolecular interactions between

Journal

Nature MaterialsSpringer Journals

Published: May 22, 2013

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