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Fabrication of Biocompatible Helical Fibers Using an Optical Vortex Beam.

Kenta Homma1,2, Yoshihisa Matsumoto3, Yasushi Tanimoto3

  • 1Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.

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Summary

Researchers used optical vortex beams to create helical gel fibers from biocompatible poly(ethylene glycol) (PEG). This novel method offers a promising approach for developing advanced tissue engineering scaffolds.

Keywords:
HelicityOptical angular momentumOptical vortexPhotopolymerizationPoly(ethylene glycol)

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Area of Science:

  • Biomaterials Science
  • Optics and Photonics
  • Tissue Engineering

Background:

  • Helical structures are crucial in biological tissues, but helical biomaterial scaffolds are underdeveloped.
  • Optical vortex beams possess helical wavefronts and carry optical angular momentum (OAM).
  • OAM from optical vortex beams can induce helical structures in photocurable resins.

Purpose of the Study:

  • To establish a method for fabricating helical fibers using biocompatible polymers.
  • To explore the potential of optical vortex beams in creating helical structures for tissue engineering.

Main Methods:

  • Photopolymerization of poly(ethylene glycol) (PEG) using an optical vortex beam.
  • Fabrication of helical gel fibers with controlled microscale dimensions.
  • Comparison with fibers fabricated using a Gaussian beam with a planar wavefront.

Main Results:

  • Successfully fabricated twisted PEG gel microscale fibers using optical vortex beams.
  • Observed minimal branching in PEG gel fibers created with optical vortex beams.
  • Demonstrated significant branching in PEG gel fibers fabricated with a Gaussian beam.

Conclusions:

  • Optical vortex beams can effectively fabricate helical structures from biocompatible polymers like PEG.
  • The OAM of optical vortex beams facilitates the formation of precise, twisted microscale fibers.
  • This technique shows significant potential for developing novel helical tissue engineering scaffolds.