FWIW, the holes are created using 'a chemical oxidation process' -- which I suspect can be done on a large scale. If someone can read the actual paper and check out how they made the holes, though, that'd be cool.
FWIW, the holes are created using 'a chemical oxidation process' -- which I suspect can be done on a large scale. If someone can read the actual paper and check out how they made the holes, though, that'd be cool.