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Microalgae-Based Tunable Hierarchical Microparticles for Multifunctional Wound Therapy.

Hui Zhou1, Jun Cai1, De Gong1

  • 1School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China.

ACS Applied Materials & Interfaces
|January 7, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed novel microalgae-based microparticles with tunable 3D structures for advanced wound healing. These biohybrid materials demonstrate enhanced antibacterial properties and promote faster wound closure and tissue regeneration.

Keywords:
Janus dressingZnO nanotubebiotemplatehierarchicalwound healing

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Area of Science:

  • Biomaterials Engineering
  • Nanotechnology
  • Regenerative Medicine

Background:

  • Microalgae-derived microparticles show promise for biomedical uses but lack structural control.
  • Fabricating hierarchical micro-/nanostructures remains a challenge for these materials.

Purpose of the Study:

  • To engineer biohybrid microparticles with tunable 3D architectures using a controllable biotemplating strategy.
  • To develop a multifunctional wound dressing for enhanced wound treatment and regenerative engineering.

Main Methods:

  • Epitaxial growth of vertically aligned zinc oxide nanotubes (ZnO NTs) on Chlorella-derived biochar microspheres.
  • Incorporation of these microparticles into a bioinspired Janus wound dressing with asymmetric wettability.
  • In vivo wound testing to evaluate antibacterial performance, wound closure, and tissue regeneration.

Main Results:

  • Engineered ZnO NTs exhibited a 2-fold enhancement in Zn2+ release kinetics compared to nanorods.
  • The Janus wound dressing facilitated unidirectional biofluid drainage, photothermal evaporation, and sterilization.
  • In vivo tests showed significant antibacterial activity, accelerated wound closure, reduced inflammation, and enhanced collagen deposition.

Conclusions:

  • Established a scalable biotemplating platform for creating multifunctional materials with hierarchical architectures.
  • Demonstrated the potential of these microparticles in precision wound treatment and regenerative engineering.
  • Highlighted the synergistic effects of combined therapies for effective wound management.