Figure 1From: Porous anodic alumina on galvanically grown PtSi layer for application in template-assisted Si nanowire growth SEM images of the surface of samples S-15 min (a), S-30 min (b), and S-50 min (c). In (a), the surface is smooth and contains a small density of spherical nanoparticles on it, while in (b), we reveal that these nanoparticles started to form clusters, which increase in volume with time (see (c)).Back to article page