Deviation from Regular Shape in the Early Stages of Formation of Strain-Driven 3D InGaAs/GaAs Micro/Nanotubes

Figure 4

High-resolution SEM images of μtubes obtained with different etching times: (a) = 20 s, (b) = 30 s; and (c) = 45 s. The scale bar is the same for all the images.

(a)

(b)

(c)