Fig. 4

Material versatility and geometric control. a Tubular mesh structure coated with 2 mg mL⁻¹ collagen gel following 1 h gelation at 37 °C. Tubular meshes coated with 7.5 wt% methacrylated gelatin hydrogel formed a complete seal that held b liquid and c air pressure. d, e Louvre-like pyramids printed in stainless steel coated with neat thiol-ene networks via photopolymerization (λ = 365 nm; I₀ = 6 mW cm⁻²; t = 30 s). f. Polyhedron coated with 7.5 wt% methacrylated gelatin. Scale bars, 1 cm