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Liquid-based gating mechanism with tunable multiphase selectivity and antifouling behaviour.

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Researchers developed a novel liquid-based gate for micro- and nanopores, enabling selective control over fluid and gas transport. This antifouling system offers tunable thresholds for diverse applications, from microfluidics to advanced filtration.

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Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Nanotechnology

Background:

  • Biological systems utilize nanopores for selective transport, inspiring synthetic alternatives.
  • Existing synthetic gated pores struggle with complex multiphase transport and fouling.

Purpose of the Study:

  • To introduce a novel liquid-based gating mechanism for micro- and nanopores.
  • To achieve selective, tunable, and antifouling control over multiphase transport.

Main Methods:

  • Utilized a capillary-stabilized liquid as a reversible gate.
  • Employed theoretical modeling and experimental validation.
  • Demonstrated tunable gating thresholds based on pressure.

Main Results:

  • Achieved selective transport of liquids and gases with a single system.
  • Successfully separated a three-phase air-water-oil mixture.
  • Exhibited sustained antifouling behavior due to liquid lining.

Conclusions:

  • The liquid gating strategy offers efficient, long-term operation for micro- and nanopore systems.
  • This approach is adaptable to various pore structures, materials, and scales.
  • Potential applications span fluid processing, 3D printing, and lab-on-chip devices.