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Pau Guillamat1,2, Žiga Kos3, Jérôme Hardoüin1,2

  • 1Department of Materials Science and Physical Chemistry, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalonia.

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Summary
This summary is machine-generated.

This study explores active nematic emulsions, combining active liquid crystal gels with thermotropic liquid crystals. These hybrid systems show dynamic self-assembly regulated by passive component equilibrium properties.

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Area of Science:

  • Soft Matter Physics
  • Active Matter Physics
  • Materials Science

Background:

  • Emulsion formation typically relies on equilibrium thermodynamics and surface-active agents.
  • Understanding emulsification with active components, not bound by equilibrium laws, remains a challenge.

Purpose of the Study:

  • To investigate the behavior of emulsions formed from active and passive liquid crystals.
  • To explore the interplay between active flows and topological defects in hybrid systems.

Main Methods:

  • Encapsulation of an active liquid crystal (LC)-like gel (microtubules and kinesin motors) within a thermotropic LC.
  • Utilizing numerical simulations to model defect interactions and feedback mechanisms.
  • Experimental characterization of active nematic emulsions with varying surfactants.

Main Results:

  • Active nematic emulsions exhibit dynamic behaviors driven by cross-talk between active and passive topological defects.
  • A feedback mechanism was identified where active flows influence passive defects, which in turn guide active defect trajectories.
  • Surfactant choice allows tuning of self-sustained dynamic events in the hybrid system.

Conclusions:

  • Hybrid active-passive systems offer new routes for dynamic self-assembly.
  • Active materials can drive self-assembly processes regulated by passive component equilibrium properties.
  • This work opens perspectives for designing novel active materials and soft machines.