Effect of substrate geometry on liquid-crystal-mediated nanocylinder-substrate interactions

David Cheung, Michael P. Allen

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using classical density functional theory, the liquid crystal (LC)-mediated interaction between a cylindrical nanoparticle and a structured substrate is studied. The surface is structured by cutting a rectangular groove into the surface. In the absence of the nanoparticle, a range of defect structures is formed in the vicinity of the groove. By varying the groove width and depth, the LC-mediated interaction changes from repulsive to attractive. This interaction is strongest when the groove is of comparable size to the nanoparticle. For narrow grooves the nanoparticle is attracted to the center of the groove, while for wider grooves there is a free energy minimum near the sidewalls.
Original languageEnglish
Article number114706
Number of pages7
JournalJournal of Chemical Physics
Volume129
Issue number11
DOIs
Publication statusPublished - 21 Sep 2008

Keywords

  • substrate geometry
  • liquid-crystal-mediated nanocylinder-substrate interactions
  • effect
  • functional theory

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