Figure 1: Initial Pb adsorption sites.
From: Templated three-dimensional growth of quasicrystalline lead
(a,c,d) STM images (300 Å × 300 Å) of a terrace of the fivefold i-Ag-In-Yb surface (a, clean surface; c, after deposition of Pb for 5 min; d, 15 min). The substrate pentagonal features and Pb pentagons are marked by blue and white pentagons, respectively, in a and c. A patch of a Penrose P1 tiling is overlaid in d. (b) Atomic structure of a bulk-terminated surface of i-Ag-In-Yb deduced from the structure of i-Cd-Yb. The vertices of pentagonal unit are uniquely decorated by Ag/In rings (red) surrounded by Yb pentagons (green). Dark red spheres represent Ag/In atoms at 0.4 Å below the top layer and blue spheres the centre of RTH units. White spheres forming small and large pentagons mark adsorption sites for Pb atoms in the first and second layers.
