Digital Light Processing (DLP) was performed using an Asiga MAX X27 UV DLP 3D printer with an LED light source of 385 nm and a pixel resolution of 27 mm. A custom aluminum build platform with a surface of 25 x 25 mm was used. The commercial vats were modified accordingly with an aluminum inlet held in place by Slygard 184 silicone elastomer. Printing was performed with a layer thickness of 100 mm at room temperature. The light intensity was fixed at 28 mW/cm 2 . After printing, the structures were carefully removed from the build platform with a thin blade and washed by ultrasonication in isopropanol for 1 min. The structures were dried and post-cured in an Asiga UV chamber for 2 min.