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Schematic illustrations of concavely and convexly patterned Al and AAO pore arrays thereof. Circular pores in hexagonal packing: anodization from concave Al, triangular pores in inverse-hexagonal packing: anodization from the replicated, convex Al.
SEM images of circular and triangular pore arrays and PS pillars replicated from triangular pore array. (a) and (b): AAO from 110 nm spacing patterns, (c) and (d): AAO from 500 nm spacing patterns, (e) and (f): replicated PS pillar array.
SEM images of triangular pore array and schematic drawings exhibiting anisotropy in pore shape. (a): top- and side-views of triangular pores, (b): wall thickening (upper) and wall thinning (lower).
Anisotropic field distribution near pits. SEM images in left: bare convex Al (top), AAO at 3 min anodization (middle), and AAO at 7 min anodization (bottom).
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