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Liquid Crystals Reviews Volume 2, 2014 - Issue 1

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The dynamics of colloidal intrusions in liquid crystals: a simulation perspective

G. FoffanoSUPA, School of Physics and Astronomy, University of Edinburgh, JCMB Kings Buildings, Mayfield Road, EdinburghEH9 3JZ, Scotland

J.S. LintuvuoriSUPA, School of Physics and Astronomy, University of Edinburgh, JCMB Kings Buildings, Mayfield Road, EdinburghEH9 3JZ, Scotland

A. TiribocchiSUPA, School of Physics and Astronomy, University of Edinburgh, JCMB Kings Buildings, Mayfield Road, EdinburghEH9 3JZ, Scotland

D. MarenduzzoSUPA, School of Physics and Astronomy, University of Edinburgh, JCMB Kings Buildings, Mayfield Road, EdinburghEH9 3JZ, ScotlandCorrespondence[email protected]

Pages 1-27 | Received 19 Nov 2013, Accepted 20 Dec 2013, Published online: 04 Mar 2014

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https://doi.org/10.1080/21680396.2013.878672
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At low surface anchoring (WR/K∼0) the colloids preferentially cover the maximum amount of the energetically expensive defect structure, leading to a self-assembled colloidal structure following the BPI disclination network.

Download Microsoft Video (AVI) (30 MB)

A rotating movie showing an equilibrium blue phase I (BPI) defect structure.

Download Microsoft Video (AVI) (25.5 MB)

Movie of a colloidal dimer showing a "stickslip" rotational dynamic when the pulling force is increased. The dimer rotation is periodically followed by translation without rotational motion. This is the phase slip regime.

Download Microsoft Video (AVI) (6.1 MB)

Movie of a colloidal dimer undergoing a steady rotation when pulled slowly along the helical axis. This is the rotor phase.

Download Microsoft Video (AVI) (12.7 MB)

A colloid (R/p = 3/4) is dragged along the helical axis of the cholesteric host with intermediate Ericksen number (Er∼0.7). This movie shows the disclination being displaced downstream to form a twisting disclination "wake".

Download Microsoft Video (AVI) (18.8 MB)

A colloidal particle (R/p = 1/2) moving along the helical axis with small forcing (small Ericksen number, Er∼0.24). This movie shows that the defect is dragged slightly downstream but remains near the particle surface.

Download Microsoft Video (AVI) (13.2 MB)

A colloid trapped at the interface between a cholesteric liquid crystal and an oil. The colloidal particle covers part of the interfacial (elastic) defects, leading to a variable elastic potential for its position along the interface.

Download Microsoft Video (AVI) (4.2 MB)

A rotating movie of a colloid (R/p =3/4) in a cholesteric. The anchoring at the particle surface is planar degenerate. Color coding according to the local director (red along x, into the page, blue along y, along the page).

Download Microsoft Video (AVI) (14.9 MB)

A rotating movie of a colloid (radius R) in a cholesteric (pitch p); the anchoring is homeotropic and R/p = 1/2. Color coding according to the local director (red along x , into the page, blue along y, along the page).

Download Microsoft Video (AVI) (12.9 MB)

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The dynamics of colloidal intrusions in liquid crystals: a simulation perspective

At low surface anchoring (WR/K∼0) the colloids preferentially cover the maximum amount of the energetically expensive defect structure, leading to a self-assembled colloidal structure following the BPI disclination network.

A rotating movie showing an equilibrium blue phase I (BPI) defect structure.

Movie of a colloidal dimer showing a "stickslip" rotational dynamic when the pulling force is increased. The dimer rotation is periodically followed by translation without rotational motion. This is the phase slip regime.

Movie of a colloidal dimer undergoing a steady rotation when pulled slowly along the helical axis. This is the rotor phase.

A colloid (R/p = 3/4) is dragged along the helical axis of the cholesteric host with intermediate Ericksen number (Er∼0.7). This movie shows the disclination being displaced downstream to form a twisting disclination "wake".

A colloidal particle (R/p = 1/2) moving along the helical axis with small forcing (small Ericksen number, Er∼0.24). This movie shows that the defect is dragged slightly downstream but remains near the particle surface.

A colloid trapped at the interface between a cholesteric liquid crystal and an oil. The colloidal particle covers part of the interfacial (elastic) defects, leading to a variable elastic potential for its position along the interface.

A rotating movie of a colloid (R/p =3/4) in a cholesteric. The anchoring at the particle surface is planar degenerate. Color coding according to the local director (red along x, into the page, blue along y, along the page).

A rotating movie of a colloid (radius R) in a cholesteric (pitch p); the anchoring is homeotropic and R/p = 1/2. Color coding according to the local director (red along x , into the page, blue along y, along the page).

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The dynamics of colloidal intrusions in liquid crystals: a simulation perspective

At low surface anchoring (WR/K∼0) the colloids preferentially cover the maximum amount of the energetically expensive defect structure, leading to a self-assembled colloidal structure following the BPI disclination network.

A rotating movie showing an equilibrium blue phase I (BPI) defect structure.

Movie of a colloidal dimer showing a "stickslip" rotational dynamic when the pulling force is increased. The dimer rotation is periodically followed by translation without rotational motion. This is the phase slip regime.

Movie of a colloidal dimer undergoing a steady rotation when pulled slowly along the helical axis. This is the rotor phase.

A colloid (R/p = 3/4) is dragged along the helical axis of the cholesteric host with intermediate Ericksen number (Er∼0.7). This movie shows the disclination being displaced downstream to form a twisting disclination "wake".

A colloidal particle (R/p = 1/2) moving along the helical axis with small forcing (small Ericksen number, Er∼0.24). This movie shows that the defect is dragged slightly downstream but remains near the particle surface.

A colloid trapped at the interface between a cholesteric liquid crystal and an oil. The colloidal particle covers part of the interfacial (elastic) defects, leading to a variable elastic potential for its position along the interface.

A rotating movie of a colloid (R/p =3/4) in a cholesteric. The anchoring at the particle surface is planar degenerate. Color coding according to the local director (red along x, into the page, blue along y, along the page).

A rotating movie of a colloid (radius R) in a cholesteric (pitch p); the anchoring is homeotropic and R/p = 1/2. Color coding according to the local director (red along x , into the page, blue along y, along the page).

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