Figure 4From: Stable superhydrophobic surface of hierarchical carbon nanotubes on Si micropillar arraysSEM images of CNTs/Si-μp and CNTs/Si after wetting. (a) Low- and (b) high-magnification SEM images of CNTs/Si-μp after wetting using nebulizer droplets. (c) Low- and (d) high-magnification SEM images of CNTs/Si after wetting using nebulizer droplets.Back to article page