Researchers Introduce 20,000-dpi Deep-Foam Photolithography for Biomimetic Printing
Updated
Updated · Nature.com · Sep 9
Researchers Introduce 20,000-dpi Deep-Foam Photolithography for Biomimetic Printing
2 articles · Updated · Nature.com · Sep 9
Summary
A new deep-foam photolithography process uses UV-A light to foam photosensitized polymer films through their full depth, creating patterned structures on both films and fibers.
About 20,000 dots per inch of resolution lets the method print inkless white and greyscale images and even generate diffractive color by controlling pore formation and collapse.
The process also produces high-aspect-ratio foams up to 20x and hierarchically rough surfaces with lotus-like superhydrophobicity, expanding it beyond imaging into functional surface engineering.
Tests across amorphous and semi-crystalline polymers showed tunable local foamability, wettability, optical properties and thickness, enabling microfluidic channels and picolitre-scale capture of liquids and colloids.
The work positions foam-forming photopolymers as a biomimetic manufacturing platform that combines printing, fluid handling and surface design in a single light-driven process.