Interaction of an inclusion and (±1)-wedge disclination in smectic C free standing films

Lejček, L.

doi:10.1007/s10582-005-0131-x

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…This term allows for a spontaneous bend deformation of the c-director and favors the dipolar defect configuration with two −1/2 surface defects placed at one side of the inclusion. Without this term, the quadrupolar configuration of the c-director with two antipodal surface defects of strength of −1/2 was found to be energetically more stable [ 99,93,100].…”

Section: Inclusions In Free Standing Smectic Filmsmentioning

confidence: 99%

Colloidal particles in liquid crystal films and at interfaces

Tasinkevych¹,

Andrienko²

2010

Condens. Matter Phys.

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This mini-review discusses the recent contribution of theoretical and computational physics as well as experimental efforts to the understanding of the behavior of colloidal particles in confined geometries and at liquid crystalline interfaces. Theoretical approaches used to study trapping, long-and short-range interactions, and assembly of solid particles and liquid inclusions are outlined. As an example, an interaction of a spherical colloidal particle with a nematic-isotropic interface and a pair interaction potential between two colloids at this interface are obtained by minimizing the Landau-de Gennes free energy functional using the finite-element method with adaptive meshes.

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Section: Inclusions In Free Standing Smectic Filmsmentioning

confidence: 99%

Colloidal particles in liquid crystal films and at interfaces

Tasinkevych¹,

Andrienko²

2010

Condens. Matter Phys.

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Energetics of 2D colloids in free-standing smectic-C films

Bohley¹,

Stannarius²

2006

Eur. Phys. J. E

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The formation of regular colloid patterns in free-standing smectic films at the transition from the smectic-C to the isotropic or nematic phase is well known experimentally. The self-organization of isotropic or nematic droplets is caused by their mutual interaction, mediated by elastic distortions of the local director in the surrounding liquid crystal. These distortions are related to the anchoring conditions of the director at the droplet border. We describe analytically the energetics of the liquid crystal environment of a single droplet in one-constant approximation. A method of complex analysis, Conformal Mapping, is employed. Following a suggestion of Dolganov et al. (Phys. Rev. E. 73, 041706 (2006)), energetics of chain and grid patterns built from the colloids are investigated numerically in order to explain experimentally observed formations and their director fields.

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Colloidal inclusions in smectic films with spontaneous bend

Bohley¹,

Stannarius²

2007

Eur. Phys. J. E

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Inclusions in free-standing smectic films are simple model systems for two-dimensional anisotropic dispersions. From theory and experiment, different topologies of elastic distortions of the embedding liquid crystal are known. Quadrupolar and different dipolar defect configurations in the vicinity of the inclusion are possible, and these configurations determine the type of interactions between the inclusions. The quadrupolar configuration is often energetically preferred. We show, however, that dipolar director configurations around inclusions can be energetically favourable over quadrupolar arrangements in chiral smectics, as a consequence of a spontaneous-bend term in the elastic-energy formulation. As the inclusion size influences the selection of the deformation types, the corresponding spontaneous-bend constant can be estimated for the strong anchoring limit if the c -director fields around inclusions of different diameters are taken into account.

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Interaction of an inclusion and (±1)-wedge disclination in smectic C free standing films

Cited by 3 publications

References 10 publications

Colloidal particles in liquid crystal films and at interfaces

Colloidal particles in liquid crystal films and at interfaces

Energetics of 2D colloids in free-standing smectic-C films

Colloidal inclusions in smectic films with spontaneous bend

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