Foaming photopolymers as a high-resolution biomimetic printing platform.

Deep-foam photolithography achieves high-resolution, 20,000 dots per inch, biomimetic foam patterning with hierarchical structures and super-hydrophobic surfaces.

• Why it matters: Creating foam-like materials with precise control over structure and properties is vital for advanced biomimetic applications, yet current methods lack high resolution and versatility.
• What they did: The team developed a light-induced foaming process using UV-A exposure on photosensitized polymers, enabling localized pore formation, collapse, and patterning across films and fibers with diverse polymers.
• The result: This technique allows for detailed printing, microfluidic device fabrication, and liquid capture, opening new avenues for high-resolution biomimetic materials with tunable surface and optical properties.