Controlled Surface Textures of Elastomeric Polyurethane Janus Particles: A Comprehensive Review

Area of Science:

• Materials Science
• Soft Matter Physics
• Biomaterials Engineering

Background:

• Colloidal particle research has advanced significantly over the last century.
• Novel applications and products have emerged from studies on colloidal particles.
• Janus particles, with distinct properties on each side, are of increasing interest.

Purpose of the Study:

• To present a cost-effective and low-tech method for producing Janus elastomeric particles.
• To demonstrate the creation of particles with varied geometries (films, spheres, fibers).
• To explore the potential of these particles in medical applications and biomimetic materials.

Main Methods:

• Utilized a single elastomeric material and accessible chemicals.
• Achieved different surface textures via strain application or solvent-induced swelling.
• Controlled surface texture wavelengths from sub-microns to millimeters.

Main Results:

• Successfully produced Janus elastomeric particles in various geometries.
• Demonstrated tunable surface textures with well-defined wavelengths.
• Showcased the coexistence of smooth ('young') and wrinkled ('old') regions on the same particle.

Conclusions:

• The developed method offers a versatile platform for Janus elastomeric particle fabrication.
• These particles show promise for bacterial adhesion studies and biomimetic applications.
• Tunable surface textures enable functionalities like Janus micromanipulators for precise object handling.