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Particle Templated Emulsification enables Microfluidic-Free Droplet Assays
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Anisotropic Particles Templated by Cerberus Emulsions.

Lingling Ge1, Jingru Cheng1, Duo Wei1,2

  • 1School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China.

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|June 7, 2018
PubMed
Summary

Researchers developed a new method for creating diverse anisotropic particles using Cerberus emulsions as templates. This versatile strategy allows for tunable morphologies and chemical compositions in batch-scale fabrication.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Colloid Science

Background:

  • Fabricating anisotropic particles with controlled morphology and composition is challenging.
  • Existing methods often lack versatility in producing diverse particle types.

Purpose of the Study:

  • To report a novel strategy for batch-scale fabrication of anisotropic particles.
  • To demonstrate the ability to control particle morphology and chemical composition.
  • To establish a universal method applicable to a wide range of polymeric particles.

Main Methods:

  • Utilizing Cerberus emulsions, formed by mixing a surfactant solution with three immiscible oils (selectively photocurable or incurable), as templates.
  • Employing UV-induced polymerization to solidify the emulsion droplets into anisotropic particles.
  • Manipulating oil combinations and volume fractions to control droplet geometry and morphology.
  • Selectively polymerizing oil lobes to achieve varied chemical compositions.

Main Results:

  • Achieved diverse particle morphologies including "engulfed-linear", "partial-engulfed-linear", and "linear-singlet" by varying oil combinations.
  • Demonstrated precise control over droplet segment volume fractions using a three-phase oil diagram.
  • Fabricated particles across a wide size range, from micrometers down to nanometers, while preserving topology.
  • Produced particles with varied chemical compositions and geometries, such as "crescent moon", "etched-Janus", and "sandwich-Janus" morphologies.

Conclusions:

  • The reported strategy provides a simple, one-step method for creating complex anisotropic particles.
  • This approach offers significant versatility in controlling particle morphology, size, and chemical composition.
  • The method is universal and extensible to a broad spectrum of polymeric anisotropic particles.