… Highly ordered hexagonally arranged pores can also be obtained by anodizing Al in acid
for several hours, with pore formation, then chemically removing this porous oxide and re-anodizing:
pores with perfect hexagonal ordering and 60−200 nm pore-to-pore spacing form in domains
a few micrometers in size. In striking contrast with this slow pore growth is the rapid
self-ordering produced by electropolishing, which is a fast anodic dissolution of the metal …
We electropolished Al single crystals to study the effect of surface defects and crystalline …