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Related Experiment Video

Updated: May 4, 2026

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
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One-step two-dimensional microfluidics-based synthesis of three-dimensional particles.

Navid Hakimi1, Scott S H Tsai, Chil-Hung Cheng

  • 1MASc candidate, Department of Chemical Engineering, Ryerson University, 135 Kerr Hall South (KHS), 350 Victoria Street, Toronto, ON, Canada, M5B 2K3.

Advanced Materials (Deerfield Beach, Fla.)
|December 12, 2013
PubMed
Summary

A novel microfluidic method creates unique 3D anisotropic microparticles. This technique uses controlled UV light and nanoparticle absorption to precisely shape magnetic and non-magnetic particles.

Keywords:
UV light polymerizationasymmetric microparticlesmagnetic hydrogelsmicroparticle engineeringthree-dimensional microparticles

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Area of Science:

  • Materials Science
  • Microfluidics
  • Polymer Chemistry

Background:

  • Microparticle synthesis often requires complex multi-step processes.
  • Achieving precise control over microparticle shape, especially in three dimensions, remains a challenge.
  • Anisotropic microparticles offer unique properties for advanced applications.

Purpose of the Study:

  • To develop a simple, one-step method for synthesizing 3D anisotropic microparticles.
  • To demonstrate the fabrication of both magnetic and non-magnetic anisotropic microparticles.
  • To utilize microfluidics for controlled microparticle engineering.

Main Methods:

  • A one-step microfluidic technique was employed.
  • Non-uniform ultraviolet (UV) light polymerization was utilized.
  • UV absorption by opaque nanoparticles within the precursor solution was exploited.
  • Discontinuous photomask patterns were used in a 2D microchannel.
  • Numerical simulations of monomer conversion predicted particle shape.

Main Results:

  • Successfully synthesized three-dimensional anisotropic microparticles.
  • Fabricated both magnetic and non-magnetic microparticles with controlled shapes.
  • Demonstrated the effectiveness of exploiting light nonuniformity and absorption for shape control.
  • Validated simulation predictions of particle morphology.

Conclusions:

  • The developed microfluidic method offers a facile and efficient route to 3D anisotropic microparticles.
  • This approach provides precise control over microparticle shape and properties.
  • The technique has potential for creating tailored microparticles for diverse applications.