Palladium (Pd) crystal islands, with 100–200 nm wide (111) top facets, were grown in ultrahigh vacuum (UHV) on an anatase (001) film supported on a SrTiO₃(001) substrate. Annealing the crystals at > 600 °C causes encapsulation by a TiO_x monolayer due to the strong metal–support interaction (SMSI). Scanning tunneling microscopy (STM) reveals that the TiO_x monolayer on the Pd(111) facets consists of two periodicities: one is a hexagonal (4 × 4)R1.5° structure, and the other is a larger-scale periodicity consisting of a two-fold symmetric pattern of dark regions that can be described by a (4√39 × 4√61)R42.4° superstructure. This double-periodicity structure requires a formation area of at least 100s of nm². An atomic model is developed that encompasses all features of the moiré superstructure.

在超高真空 (UHV) 中，在 SrTiO ₃ (001) 衬底上支撑的锐钛矿 (001) 膜上生长具有 100-200 nm 宽 (111) 顶面的钯 (Pd) 晶体岛。由于强烈的金属 - 载体相互作用（SMSI），在> 600°C 下退火晶体会导致 TiO _x单层包封。扫描隧道显微镜 (STM) 显示Pd(111) 面上的 TiO _x单层由两种周期性组成：一种是六边形 (4 × 4) R 1.5° 结构，另一种是由可以由 (4√39 × 4√61) R 42.4° 上层结构描述的暗区的二重对称模式。这种双周期结构需要至少 100 纳米的形成面积² . 开发了一个原子模型，其中包含莫尔上层结构的所有特征。