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. 2016 Apr 4;6:23687. doi: 10.1038/srep23687

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Inline graphic — and φ_a are measured at a height of the pillar’s top face (z = 10 μm). The pillars had a rectangular or circular cross-section of 10 μm or 20 μm width and identical spacing.

and φ_a are measured at a height of the pillar’s top face (z = 10 μm). The pillars had a rectangular or circular cross-section of 10 μm or 20 μm width and identical spacing.