Large-Scale Patterning of Gold Nanopillars in a Porous Anodic Alumina Template by Replicating Gold Structures on a Titanium Barrier

Gold nanopillars are grown in patterns inside a porous anodic alumina template. On selected positions, defined by a gold seed pattern, gold is electroplated into the pores, while a barrier layer underneath the porous template blocks the deposition on the rest of the surface. Large-scale arrays of free-standing nanopillar islands are obtained after selective etching of the alumina template.