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Structured spheres generated by an in-fibre fluid instability.

Joshua J Kaufman1, Guangming Tao, Soroush Shabahang

  • 1CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA.

Nature
|July 20, 2012
PubMed
Summary

Researchers developed a scalable fiber-based method to create uniform spherical particles. This technique produces particles ranging from 2mm to 20nm, enabling diverse applications in materials science and medicine.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Efficient fabrication of particles with controlled size, structure, and material composition is crucial for applications in drug delivery, catalysis, and cosmetics.
  • Existing methods often face limitations in scalability, uniformity, and structural diversity.

Purpose of the Study:

  • To develop a scalable and versatile method for fabricating uniformly sized, structured spherical particles.
  • To demonstrate the production of particles with a wide range of sizes (2mm down to 20nm) and complex architectures.

Main Methods:

  • Harnessing fiber production scalability and in-fiber Plateau-Rayleigh capillary instability.
  • Utilizing thermal processing of multimaterial fibers to induce controlled instability and emulsion formation.
  • In situ freezing of fiber core and cladding to solidify the structure, followed by particle release.

Main Results:

  • Achieved fabrication of uniformly sized spherical particles across an exceptionally wide size range (2mm to 20nm).
  • Successfully produced composite particles with various structures, including core-shell, Janus, and beach ball configurations.
  • Demonstrated high-throughput parallelization potential with the ability to embed a large density of cores in fibers.

Conclusions:

  • The developed fiber-based capillary instability method offers a scalable and versatile platform for producing structured micro- and nanoparticles.
  • This approach enables precise control over particle size, composition, and architecture, opening new avenues for advanced material design.
  • The high degree of parallelization offers unprecedented efficiency for mass production of tailored spherical particles.