Get the full paper here: Nature, 503, 247 (2013). The concept of hierarchical bottom-up structuring commonly encountered in natural materials provides inspiration for the design of complex artificial materials with advanced functionalities1, 2. Natural processes have achieved the orchestration of multicomponent systems across many length scales with very high precision3, 4, but man-made self-assemblies still face obstacles in realizing well-defined hierarchical structures5, 6