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Spiral formation at the microscale by μ-pyro-electrospinning.

L Mecozzi1, O Gennari, R Rega

  • 1Institute of Applied Sciences & Intelligent Systems of the National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy. simonetta.grilli@cnr.it.

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Summary

Researchers created microscale spiral fibers using μ-pyro-electrospinning, controlling instabilities to form regular patterns. Polymer concentration is key for reliable spirals, useful for cochlea regeneration scaffolds.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Spiral geometries are prevalent in nature, seen in snail shells and the cochlea.
  • These natural and technological spiral structures offer unique properties for various applications.

Purpose of the Study:

  • To demonstrate μ-pyro-electrospinning for controlled fabrication of microscale spiral fibers.
  • To investigate the influence of polymer concentration on spiral formation.
  • To assess the potential of these regular spiral templates for biomedical applications, specifically cochlea regeneration.

Main Methods:

  • Utilizing μ-pyro-electrospinning to induce and control whipping instabilities.
  • Fabricating spiral fibers with diameters down to 300 nm directly onto a support.
  • Systematically varying polymer concentration to optimize spiral morphology and regularity.
  • Investigating cellular response to the fabricated spiral microstructures.

Main Results:

  • Successfully produced microscale spiral fibers with high regularity using μ-pyro-electrospinning.
  • Identified polymer concentration as a critical factor for generating reliable and elongated spirals.
  • Demonstrated the potential of these regular spiral templates for guiding cell behavior.

Conclusions:

  • μ-pyro-electrospinning offers precise control over fiber morphology, enabling the creation of regular microscale spirals.
  • Optimized polymer concentration is essential for reproducible spiral fiber fabrication.
  • These engineered spiral scaffolds show promise for advanced tissue engineering, particularly for regenerating the complex structure of the cochlea.