Figure 2.

Typical SEM images of the coral-like AlN nanostructures: a a low-magnification SEM image of high-density as-grown coral-like products; b shows a clear dendritic structure; c a close view of fine branches with melt-out surface.

Yang et al. Nanoscale Res Lett 2011 6:12   doi:10.1007/s11671-010-9745-4