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Figure 8
HRSTEM image of a superstructure-like pattern in an Si NW growing along the [21[\overline 1]] direction. The superlattice seems to have a periodicity of 3d(111), and atomic columns inside the lattice are clearly resolved. In the top right corner is a `simulation' of this superstructure-like pattern that consists of a superposition of the twinned parts of Fig. 4[link](b), as explained in §5.2[link].

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