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Reconfigurable emergent patterns in active chiral fluids.

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|September 4, 2020
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Summary
This summary is machine-generated.

Chiral colloidal rollers exhibit controllable dynamic phases, including spinners, vortices, and flocks, by adjusting their activity. This research offers insights into self-organization in active chiral systems.

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Area of Science:

  • Soft Matter Physics
  • Active Matter
  • Colloidal Science

Background:

  • Active fluids with spinning units are key for designing advanced materials.
  • Chiral active units are expected to introduce greater dynamic complexity.

Purpose of the Study:

  • To investigate emergent dynamic phases in chiral active matter.
  • To demonstrate control over particle motion and alignment through activity modulation.

Main Methods:

  • Utilizing shape anisotropy in colloidal particles to create chiral rollers.
  • Modulating particle activity via variations in an energizing electric field.
  • Observing emergent dynamic phases such as spinners, vortices, and flocks.

Main Results:

  • Chiral rollers displayed activity-controlled trajectory curvature and spontaneous handedness.
  • Emergent dynamic phases included polar and nematic alignments, spinners, aster-like vortices, and rotating flocks.
  • Dynamic states were controllable and reversible by adjusting particle activity.

Conclusions:

  • Findings provide insights into spatial and temporal coherence in chiral active systems.
  • Highlights design pathways for self-organizing and reconfigurable active materials.