Cover Picture: Hierarchy Selection, Position Control, and Orientation of Growing Mesostructures by Patterned Surfaces (Adv. Mater. 8/2006)



Spontaneous hierarchical organization of silica by means of a command surface is shown on the cover and described on p. 1055 by Marlow and co-workers. In this approach, the usual co-existence of energetically similar structures is overcome, permitting selection of one hierarchical silica structure. A patterned substrate is shown to lead to pixel-like, simultaneous growth of a hierarchal assembly involving four structural levels. The individual pixels belong to a new class of circularly organized solids.