One layer AFM 1 × 1 μm image of In0.4Ga0.6As QDs in samples grown under different conditions. Sample A (left) shows 1D chain-like ordering along the direction. Sample B (right) shows mostly isotropic or randomized dot distribution in the (001) plane.
Villegas-Lelovsky et al. Nanoscale Res Lett 2011 6:56 doi:10.1007/s11671-010-9786-8