The influence of anisotropic diffusion on Ag nanowire formation
Photoemission electron microscopy is used to study the growth of single-crystalline silver nanowires on flat and vicinal Si(001) substrates. The growth experiments were performed at various temperatures and showed a temperature dependence of nanowire formation. The nanowires on Si(001) are evenly distributed in the  and  directions on the surface, whereas on a 4° vicinal surface the wires grow only along the steps, in the  direction. This change in wire distribution is attributed to the increasing diffusion anisotropy as the vicinality of the substrate increases.
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