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      Atomic scale study of superlow friction between hydrogenated diamond surfaces

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      Author(s)
      Dag, S.
      Çıracı, Salim
      Date
      2004
      Source Title
      Physical Review B - Condensed Matter and Materials Physics
      Print ISSN
      1098-0121
      Publisher
      American Physical Society
      Volume
      70
      Issue
      24
      Pages
      1 - 4
      Language
      English
      Type
      Article
      Item Usage Stats
      234
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      Abstract
      Strong attractive interaction between two clean diamond (001) slabs turns repulsive upon the hydrogenation of surfaces. This repulsive interaction serves as if a boundary lubricant and prevents the sliding surfaces from being closer to each other even under high normal forces. As a result, calculated lateral force variation generated during sliding has small magnitude under high constant loading forces. Superlow friction observed earlier between diamondlike carbon-coated surfaces can be understood by the steady repulsive interaction between sliding surfaces, as well as strong and stiff carbon-carbon and carbon-hydrogen bonds which do not favor energy dissipation. In ambient conditions, the steady repulsive interaction is, however, destroyed by oxygen atoms which chemically modify those stiff surface bonds.
      Keywords
      Diamond
      Article
      Atom
      Friction
      Hydrogen bond
      Hydrogenation
      Mathematical analysis
      Molecular interaction
      Permalink
      http://hdl.handle.net/11693/24165
      Published Version (Please cite this version)
      http://dx.doi.org/10.1103/PhysRevB.70.241401
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