Figure 12: Free-standing metallic pyramidal shells
This work describes a route to fabricate metallic shells with a pyramidal structure where the tips have a radius of curvature of ~50 nm. The templates are formed by anisotropic etching of Si. The metal shells are formed by electrodeposition. The uniformity of the templates fabricated by photolithography or soft lithography ensures the uniformity in shape and size of the pyramidal shells.