Self-Directed Self-Assembly

Directed self-assembly (DSA) of block copolymers (BCP) provides a powerful tool to fabricate complex thin film structures at small length scale. Despite its success in fabricating various 2D patterns, fabrication of complex 3D nanostructures remains a challenge. Here, we introduce a novel method, which we call Self-Directed Self-Assembly, to self-assemble using block copolymers 3D designer nanostructures. In particular we demonstrate that uniform multilayer nanostructures can be obtained through stacking two or more "orthogonal" block copolymers. By introducing graphoepitaxy or chemoepitaxy to the first layer and performing multilayer stacking, information propagates upwards. Different complex multilayer structures will be shown To finalize we will present an outlook of exciting new avenues of research in this field.