Table 1 Details of the bSi and bD needles as measured by scanning electron microscopy.

From: Studies of Black Diamond as an antibacterial surface for Gram Negative bacteria: the interplay between chemical and mechanical bactericidal activity

Sample

Tip radius/nm

Length/µm

Needle areal density/µm−2

bSi

30 ± 5

4.6 ± 1.5

1.4

bD

300 ± 50

3.0 ± 1.3

1.2

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