Electronic Structure of Single-Wall Silicon Nanotubes and Silicon Nanoribbons: Helical Symmetry Treatment and Effect of Dimensionality

Figure 3

(color online) The appearance of the tube terminations for (a) [(7,7),𝑚_tr=31] and (b) [(7,0),𝑚_tr=31] helical types of SWSiNTs with the same diameter ≈8.76 Å.

(a)

(b)