Figure 1
From: Replica-mold nanopatterned PHEMA hydrogel surfaces for ophthalmic applications
(a) Overview of the nanopatterned array with an area 540 × 540 µm2 consisting of 1,361,700 holes on the silicon mold. (b) The detailed view of the array of big (30 kV, 160 pA) holes (scale bar 1 µm). Images were acquired by SEM (5 kV, 160 pA).
