Figure 2.

(Color online) Sequence of 1 μm × 1 μm horizontal crosscuts at heights (toptobottompanels)z= 8, 22, and 39 nm, with respect to the Si substrate level, for islands on a flat (left) and patterned (right) surface area. Thegrayscale represents the local surface slope, while the Ge molar fraction is color coded

Pezzoli et al. Nanoscale Research Letters 2009 4:1073-1077   doi:10.1007/s11671-009-9360-4