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Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets
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Published on: August 13, 2016

Defect coalescence in spherical nematic shells.

Teresa Lopez-Leon1, Martin A Bates, Alberto Fernandez-Nieves

  • 1School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 4, 2012
PubMed
Summary
This summary is machine-generated.

Topological defects in nematic liquid crystals within spherical shells coalesce into pairs. This process forms two single defects, influenced by shell geometry and thickness variations.

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Area of Science:

  • Physics
  • Materials Science

Background:

  • Nematic liquid crystals exhibit topological defects due to geometric constraints.
  • Spherical confinement introduces specific topological defect configurations.

Purpose of the Study:

  • To investigate the coalescence of topological defects in spherical nematic liquid crystals.
  • To understand the role of surface anchoring and shell geometry in defect dynamics.

Main Methods:

  • Experimental observation of defect behavior.
  • Computational simulations of liquid crystal hydrodynamics.

Main Results:

  • Four s=+1/2 defects coalesce into two s=+1 defects upon changing surface anchoring.
  • Coalescence speed is maximized when defects are antipodal, linked to shell thickness inhomogeneity.

Conclusions:

  • Surface orientation change drives defect pair coalescence in confined nematics.
  • Shell thickness variations significantly impact defect dynamics and coalescence rates.