Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Inspired by the amphiphilicity of graphene oxide (GO), the surface of water is used as a template for the assembly of a GO film. Methacrylate‐functionalized GO sheets can be cross‐linked instantaneously at the water–air interface to form a highly wrinkled membrane spreading over an extended area. The multiple covalent linkages amongst the GO sheets enhances the in‐plane stiffness of the film compared to noncovalently bonded GO films. The highly convoluted GO membrane can be used in two applications: the promoting of spontaneous stem‐cell differentiation towards bone cell lineage without any chemical inducers, and for supercapacitor electrodes. Due to reduced van der Waals restacking, capacitance values up to 211 F g<jats:sup>−1</jats:sup> can be obtained. The scalable and inexpensive nature of this assembly route enables the engineering of membranes for applications in regenerative medicine and energy‐storage devices where secondary structures like nanotopography and porosity are important performance enhancers.</jats:p>