Tue, 14 Oct 2025 06:40:27 +0000

Researchers developed a one-step method to fabricate microstructures with tunable structural color using a single-size nanoparticle composite. By adjusting laser writing parameters, they control interparticle spacing to span the full visible spectrum. The approach is versatile, precise, and compatible with soft hydrogels—paving the way for applications in chemical encryption, sensing, and bioengineering with brilliant, programmable colors.