Connectivity, not density, dictates percolation in nematic liquid crystals of slender nanoparticles

Shari Finner (Corresponding author), Tanja Schilling, Paul van der Schoot

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Abstract

We show by means of continuum theory and simulations that geometric percolation in uniaxial nematics of hard slender particles is fundamentally different from that in isotropic dispersions. In the nematic, percolation depends only very weakly on the density and is, in essence, determined by a distance criterion that defines connectivity. This unexpected finding has its roots in the nontrivial coupling between the density and the degree of orientational order that dictate the mean number of particle contacts. Clusters in the nematic are much longer than wide, suggesting the use of nematics for nanocomposites with strongly anisotropic transport properties.
Original languageEnglish
Article number097801
Number of pages5
JournalPhysical Review Letters
Volume122
Issue number9
DOIs
Publication statusPublished - 5 Mar 2019

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liquid crystals
nanoparticles
nanocomposites
transport properties
continuums
simulation

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title = "Connectivity, not density, dictates percolation in nematic liquid crystals of slender nanoparticles",
abstract = "We show by means of continuum theory and simulations that geometric percolation in uniaxial nematics of hard slender particles is fundamentally different from that in isotropic dispersions. In the nematic, percolation depends only very weakly on the density and is, in essence, determined by a distance criterion that defines connectivity. This unexpected finding has its roots in the nontrivial coupling between the density and the degree of orientational order that dictate the mean number of particle contacts. Clusters in the nematic are much longer than wide, suggesting the use of nematics for nanocomposites with strongly anisotropic transport properties.",
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Connectivity, not density, dictates percolation in nematic liquid crystals of slender nanoparticles. / Finner, Shari (Corresponding author); Schilling, Tanja; van der Schoot, Paul.

In: Physical Review Letters, Vol. 122, No. 9, 097801, 05.03.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Connectivity, not density, dictates percolation in nematic liquid crystals of slender nanoparticles

AU - Finner, Shari

AU - Schilling, Tanja

AU - van der Schoot, Paul

PY - 2019/3/5

Y1 - 2019/3/5

N2 - We show by means of continuum theory and simulations that geometric percolation in uniaxial nematics of hard slender particles is fundamentally different from that in isotropic dispersions. In the nematic, percolation depends only very weakly on the density and is, in essence, determined by a distance criterion that defines connectivity. This unexpected finding has its roots in the nontrivial coupling between the density and the degree of orientational order that dictate the mean number of particle contacts. Clusters in the nematic are much longer than wide, suggesting the use of nematics for nanocomposites with strongly anisotropic transport properties.

AB - We show by means of continuum theory and simulations that geometric percolation in uniaxial nematics of hard slender particles is fundamentally different from that in isotropic dispersions. In the nematic, percolation depends only very weakly on the density and is, in essence, determined by a distance criterion that defines connectivity. This unexpected finding has its roots in the nontrivial coupling between the density and the degree of orientational order that dictate the mean number of particle contacts. Clusters in the nematic are much longer than wide, suggesting the use of nematics for nanocomposites with strongly anisotropic transport properties.

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DO - 10.1103/PhysRevLett.122.097801

M3 - Article

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VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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