Fast One‐Step Fabrication of Highly Regular Microscrolls with Controllable Surface Morphology

Although rolling origami technology has provided convenient access to three‐dimensional (3D) microstructure systems, the high yield and scalable construction of complex rolling structures with well‐defined geometry without impeding functionality has remained challenging. The straightforward, one‐step fabrication that uses external mechanical stress to scroll micrometer thick, flexible planar films with centimeter lateral dimensions into tubular or spiral geometry within a few seconds is demonstrated. The method allows controlling the scrolls’ diameter, number of windings and nanostructured surface morphology, and is applicable to a wide range of functional materials. The obtained 3D structures are highly promising for various applications including sensors, actuators, microrobotics, as well as energy storage and electronic devices.