Electro-Sorting Create Heterogeneity: Constructing A Multifunctional Janus Film with Integrated Compositional and...

Area of Science:

• Biomaterials Science
• Soft Matter Physics
• Tissue Engineering

Background:

• Biology excels at creating functional soft matter through hierarchical organization of proteins and polysaccharides.
• Fabricating materials with controlled heterogeneity in composition and microstructure remains a challenge.

Purpose of the Study:

• To develop a novel method for creating functional gradient soft matter.
• To demonstrate the application of this method in guided bone regeneration.

Main Methods:

• Utilizing controlled, mild electronic inputs (<10 V; <20 min) to induce self-assembly.
• Processing a homogeneous gelatin-chitosan mixture into a Janus film with compositional and microstructural gradients.

Main Results:

• Successful fabrication of a Janus film with tunable compositional (chitosan-enriched to chitosan/gelatin) and microstructural (dense-porous) gradients.
• Demonstrated asymmetric properties including flexible mechanics, tunable wettability, directional growth factor release, and selective cellular responses (inhibiting fibroblast infiltration while promoting osteoblast growth).

Conclusions:

• Electrofabrication offers a versatile approach for customized manufacturing of functional gradient soft matter.
• The developed Janus film shows significant potential for guided bone regeneration applications due to its integrated functional features.