Facile and Scalable Synthesis of Tailored Silica “Nanorattle” Structures

Silica “nanorattles” are fabricated by means of selective etching of ingeniously designed organic–inorganic hybrid silica spheres with a three‐layer “sandwich” structure. The size (95–645 nm), shell thickness, and core diameter of the monodisperse nanorattles can be precisely controlled, even in gram‐scale production. This method is also shown to be promising for development as a general method for synthesis of rattle‐type functional nanomaterials.