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Shape-Evolving Structured Liquids.

Paul Y Kim1, Shipei Zhu1, Joe Forth2,3

  • 1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.

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Summary
This summary is machine-generated.

Researchers created a synthetic cell mimic using active particles and a reconfigurable membrane. This system exhibits controllable shape changes and movement, mimicking living cells and enabling new responsive materials.

Keywords:
active matterinterfacial assemblystructured liquids

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Area of Science:

  • Biomimetic materials science
  • Synthetic biology
  • Active matter physics

Background:

  • Living systems rely on active processes like migration and division, which are challenging to replicate synthetically.
  • Existing synthetic mimics using lipid bilayers lack persistent shape changes and control after active component deactivation.

Purpose of the Study:

  • To develop a fully synthetic system that mimics the dynamic functions of living cells.
  • To create reconfigurable and responsive materials with controllable shape evolution.

Main Methods:

  • Encapsulating active particles within a reconfigurable nanoparticle-surfactant membrane.
  • Utilizing surfactant concentration to tune interfacial tension and control membrane dynamics.
  • Observing shape fluctuations, migration, division, and reconfiguration of the synthetic system.

Main Results:

  • The synthetic system exhibits shape fluctuations similar to living cells.
  • Shape changes are preserved after the cessation of particle activity.
  • Surfactant concentration allows for precise control over interfacial tension and on-demand shape evolution.
  • Demonstrated directional migration, division, and reconfiguration across multiple scales.

Conclusions:

  • A novel synthetic system capable of autonomous functions like migration and division has been developed.
  • This system represents a new class of biomimetic, reconfigurable, and responsive materials.
  • The findings pave the way for the creation of autonomous synthetic machines.