Effect of fluorocarbon molecules confined between sliding self-mated PTFE surfaces

Peter R. Barry, Patrick Y. Chiu, Scott S. Perry, W. Gregory Sawyer, Simon R. Phillpot, Susan B. Sinnott

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We report on the frictional response and atomic process that occur when molecular fluorocarbon molecules of varying lengths are sheared between two polytetrafluoroethylene (PTFE) surfaces. The thicknesses of the molecular layers are also varied. The approach is classical molecular dynamics simulations using a reactive bond-order potential parametrized for fluorocarbons. The results indicate that the presence of the molecules has a significant impact on the measured friction and wear of the surfaces, and that this impact depends on the nature of the fluorocarbon molecules and the thickness of the molecular film. The molecular mechanisms responsible for these differences are presented.

Original languageEnglish (US)
Pages (from-to)9910-9919
Number of pages10
Issue number16
StatePublished - Aug 16 2011

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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