Unless I misunderstood, the fingernail sized object was just a prototype and the important thing isn't the size of the "cell" but the number of 100nm holes in t

Unless I misunderstood, the fingernail sized object was just a prototype and the important thing isn't the size of the "cell" but the number of 100nm holes in the material. I wonder if the kind of lithography used for semiconductor manufactur would be a useful way to produce this material?