Figure 1.

AFM 2 × 2 micron images of Sample A (a) and B (b). Insets show a 3D-magnified picture of a single structure. Cross sectional height profiles of a single Ga droplet and concentric triple quantum ring (c)

Somaschini et al. Nanoscale Research Letters 2010 5:1897-1900   doi:10.1007/s11671-010-9752-5