Study of friction between liquid crystals and crystalline surfaces by molecular dynamic simulations

Yong Wen Zhang, Xiao Song Chen, Wei Chen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The lubrication characteristics of liquid crystal (LC) molecules sheared between two crystalline surfaces obtained from molecular dynamics (MD) simulations are reported in this article. We consider a coarse-grained rigid bead-necklace model of the LC molecules confined between two atomic surfaces subject to different shearing velocities. A systematic study shows that the slip length of LC lubrication changes significantly as a function of the LC-surface interaction energy, which can be well described though a theoretical curve. The slip length increases as shear rate increases at high LC-surface interaction energy. However, this trend can not be observed for low interaction energy. The orientation of the LC molecules near the surface is found to be guided by the atomics surfaces. The influence of temperature on the lubrication characteristics is also discussed in this article.

Original languageEnglish
Pages (from-to)467-473
Number of pages7
JournalCommunications in Theoretical Physics
Volume66
Issue number4
DOIs
StatePublished - 1 Oct 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 Chinese Physical Society and IOP Publishing Ltd.

Keywords

  • friction
  • liquid crystal
  • molecular dynamics simulation
  • slip length

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