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Active microfluidic transport in two-dimensional handlebodies.

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This summary is machine-generated.

Researchers controlled active nematics using microfluidic channels. This allows for directional flow and autonomous transport, paving the way for new biotechnological and materials science applications.

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Area of Science:

  • Soft Matter Physics
  • Microfluidics
  • Biophysics

Background:

  • Active nematics are intrinsically disordered due to self-sustained internal flows, unlike traditional liquid crystals.
  • Controlling active nematic flow patterns is crucial for their application as functional materials.

Purpose of the Study:

  • To demonstrate controlled directional flows and autonomous transport of active nematics.
  • To investigate the behavior of active nematics confined in microfluidic channel networks.

Main Methods:

  • Confining a tubulin-kinesin active nematic in a network of connected annular microfluidic channels.
  • Utilizing asymmetric corrugations on channel walls to control flow direction.
  • Analyzing flow dynamics in single and interconnected annular channels.

Main Results:

  • Well-defined circulating flows were achieved in narrow annular channels, with controllable directionality.
  • Interconnecting channels led to synchronization, anti-correlation, and frustration of active flows.
  • High topological singularities in flow and orientational fields were stabilized.

Conclusions:

  • Confining active nematics in microfluidic networks enables precise control over their flow dynamics.
  • This platform offers new possibilities for applications in biotechnology and materials science.
  • The study highlights the potential of active nematics for autonomous transport and complex pattern formation.