requiring quick, controlled polymerization, such as in 3D printing, dental materials, and protective coatings. In many cases, benzophenone and related photoinitiators are dissolved or uniformly dispersed throughout the monomers to be polymerized. This leads to well-defined and uniform polymeric films. To spatially resolve photopolymerization, a top-down approach is typically used, employing a computer-controlled light source or photomask to ensure that polymerization occurs only in unmasked areas. The photomask ensures that only selected areas undergo polymerization, enabling the creation of fine, detailed structures such as microcircuits or complex 3D patterns. An alternative approach to spatial resolution would be to isolate the benzophenone in specific regions. There are examples where benzophenone has been immobilised on a surface to ensure that the photoinitiation and polymerization occurs from this interface. These surfaces can be flat or can be curved such as from textile fibres. The benzophenone is typically covalently bound to the surface in some way. Examples of initiators that allow gradients to be prepared based on density have also been described. As an alternative approach, here we describe the use of surfactant-like aggregates with a benzophenone core as a means of localizing the photoactive groups (Figure ). We use dipeptides functionalised at the N-terminus with benzophenone. These molecules self-assemble in water to give micellar aggregates. Judicious design enables the formation of worm-like micellar aggregates with a suitable viscosity such that gel "noodles" can be prepared on crosslinking under extrusion. These noodles can be used as photoinitators for polymerizations, spatially locking the initiation sites and leading to localised polymerization from the surface of the noodle. The noodle can be removed post-polymerization allowing hollow core structures to be formed from the noodle templates.