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.
LanguageEnglish
Article number114706
Number of pages7
JournalJournal of Chemical Physics
Volume129
Issue number11
DOIs
Publication statusPublished - 21 Sep 2008

Fingerprint

Liquid Crystals
grooves
liquid crystals
Nanoparticles
Geometry
Substrates
geometry
interactions
nanoparticles
Defect structures
Free energy
Density functional theory
free energy
density functional theory
defects

Keywords

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

Cite this

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title = "Effect of substrate geometry on liquid-crystal-mediated nanocylinder-substrate interactions",
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.",
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journal = "Journal of Chemical Physics",
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Effect of substrate geometry on liquid-crystal-mediated nanocylinder-substrate interactions. / Cheung, David; Allen, Michael P.

In: Journal of Chemical Physics , Vol. 129, No. 11, 114706, 21.09.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of substrate geometry on liquid-crystal-mediated nanocylinder-substrate interactions

AU - Cheung, David

AU - Allen, Michael P.

PY - 2008/9/21

Y1 - 2008/9/21

N2 - 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.

AB - 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.

KW - substrate geometry

KW - liquid-crystal-mediated nanocylinder-substrate interactions

KW - effect

KW - functional theory

U2 - 10.1063/1.2977968

DO - 10.1063/1.2977968

M3 - Article

VL - 129

JO - Journal of Chemical Physics

T2 - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

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M1 - 114706

ER -