Computer Simulations and Defects in Confined Liquid Crystal Lattice Models

Chiccoli, C.; Pasini, Paolo; Feruli, Ivan; Zannoni, Claudio

doi:10.1007/978-94-010-0512-8_4

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…In 2000, Claudio and colleagues organised an meeting in Erice entitled 'Defects in liquid crystals, computer simulations, theory and experiments', the contents of which were published as a book [68]. Among many interesting articles were several reports from the Bologna group simulating defect properties and behaviour [69]. The subject has attracted further interest because of the interactions between point defects in a nematic colloid and the colloidal particles themselves (see e.g.…”

Section: Sir Charles Frank and Disclinationsmentioning

confidence: 99%

Some reflections on defects in liquid crystals: from Amerio to Zannoni and beyond

Sluckin

2018

Liquid Crystals

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Section: Sir Charles Frank and Disclinationsmentioning

confidence: 99%

Some reflections on defects in liquid crystals: from Amerio to Zannoni and beyond

Sluckin

2018

Liquid Crystals

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“…This is particularly useful when the system is confined and the number of molecules of the sample is finite, albeit large, so that periodic boundary conditions cannot be employed. We have shown that this technique is useful in investigating sub-micron droplets with fixed (homeotropic and planar) surface anchoring mimicking polymer dispersed liquid crystals (PDLC), twisted nematic displays and thin nematic films [3]. The large number of particles which can be simulated on a lattice allows us also to simulate the optical textures, as can be obtained by a polarized microscopy experiment, with a sufficient number of pixels.…”

Section: Introductionmentioning

confidence: 99%

Biaxial Nematic Droplets and their Optical Textures: A Lattice Model Computer Simulation Study

Chiccoli

Pasini

Feruli

et al. 2005

Molecular Crystals and Liquid Crystals

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Topological defects around a spherical nanoparticle in nematic liquid crystal: Coarse-grained molecular dynamics simulations

Ilnytskyi

Trokhymchuk

Schoen

2014

The Journal of Chemical Physics

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We consider the applicability of coarse-grained molecular dynamics for the simulation of defects in a nematic liquid crystal around a colloidal particle. Two types of colloids are considered, a soft colloid resembling a liquid crystal dendrimer or a similar macromolecule. In addition, a decorated colloid is used which could represent a gold nanoparticle with mesogen-modified surface. For both models we consider homeotropic and tangential anchoring. Precise control of the easy axis on the colloid's surface enables us to focus on specific planar arrangements in the case of a decorated colloid. The nematic phase is modelled explicitly via soft spherocylinders interacting through a potential, suggested by Lintuvuori and Wilson [J. Chem. Phys. 128, 044906 (2008)]. Properties of the nematic phase are studied by computing the Frank elastic constants. In addition, estimates for the nematic-isotropic transition and the coherence length allow us to establish a relation between energy and length scales with respect to experimental systems. Both models exhibit similar defect topologies, namely, that of a Saturn ring and a boojum-type of defect for homeotropic and tangential surface anchoring, respectively. In the decorated colloid model we tune the anchoring strength through the density of the mesogenic shell on the surface. We also found the biaxial boojum defect for the special case of longitudinal planar anchoring. The study demonstrates the potential of coarse-grained simulation methods for studying defects in liquid crystals.

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Computer Simulations and Defects in Confined Liquid Crystal Lattice Models

Cited by 3 publications

References 44 publications

Some reflections on defects in liquid crystals: from Amerio to Zannoni and beyond

Some reflections on defects in liquid crystals: from Amerio to Zannoni and beyond

Biaxial Nematic Droplets and their Optical Textures: A Lattice Model Computer Simulation Study

Topological defects around a spherical nanoparticle in nematic liquid crystal: Coarse-grained molecular dynamics simulations

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