Crystalline Pd nanowires on the MgO(210) faceted template

Abstract

Shadow deposition fabricated Pd nanowires with well-oriented crystalline axes on MgO(210) faceted templates, and highresolution transmission electron microscopy was used to examine the growth of the Pd nanowires in the [001] direction. The plane-view transmission electron microscopy images show long moiré fringes in the [001] directions with some imperfections, while the diffraction patterns contain Pd spots. The [001] and [010] directions of the Pd lattices are in the same directions as those of MgO lattices, but their lattice constants differ by 7.6%. The high crystallinity of Pd nanowires likely originates from the lowdensity nuclei growth on the (100) facet on the MgO(210) face.