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Polymeric Microreactors with pH-Controlled Spatial Localization of Cascade Reactions.

Tsvetomir Ivanov1, Shoupeng Cao1, Nitin Bohra1

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Researchers developed adaptive polymeric microreactors that mimic cell-like compartments. These pH-responsive systems dynamically control internal catalytic organelles for applications in catalysis and biosensing.

Keywords:
biomimetic membranescoacervatesmicrofluidicsmicroreactorspolymersomes

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Area of Science:

  • Biomimetic materials science
  • Chemical engineering
  • Cellular engineering

Background:

  • Lipid and polymer vesicles are cell mimics but lack adaptive compartmentalization.
  • Cells exhibit dynamic subcompartment assembly/disassembly modulated by environmental cues.
  • Existing synthetic systems struggle to replicate this dynamic behavior.

Purpose of the Study:

  • To create a fully polymeric microreactor with adaptive pH-responsive compartmentalization.
  • To develop a system mimicking dynamic subcompartment formation and dissolution.
  • To enable responsive sequestration and localization of enzymes and products.

Main Methods:

  • Fabrication of polymersomes using microfluidics and oleyl alcohol in under 1 minute.
  • Development of a coacervate-in-vesicle architecture.
  • Incorporation of polyelectrolyte-based catalytic organelles within the polymersomes.
  • Utilizing proton and substrate diffusion as external signals.

Main Results:

  • Successfully constructed pH-responsive adaptive microreactors.
  • Demonstrated dynamic sequestration and localization of enzymes and reaction products.
  • Polymersomes allowed controlled diffusion of protons and substrates.
  • The system exhibited rapid and efficient construction.

Conclusions:

  • The coacervate-in-vesicle microreactor offers a novel platform for adaptive compartmentalization.
  • This technology enables dynamic control of internal reaction environments.
  • Potential applications include advanced catalysis, biosensing, and sophisticated cell mimicry.