Understanding and control of the epitaxial multilayer growth of aromatic molecules on single crystalline metal substrates

单晶样的有机多层膜的外延生长在选定的金属表面上，选择提供弱或强的相互作用在混合界面，进行了研究。特别地，虽然含有杂原子的分子形成位点特异性共价键，但低聚并苯在Cu（110）表面上的生长的特征在于第一层中的扩展界面状态和平坦的分子取向。相反，对于提供弱相互作用的表面，如Bi（001）和硅烯，直立和平坦取向都发生，并且由薄膜晶体的各种晶面的特定晶格匹配条件控制。结果提供了一个详细的了解，在实现外延生长和单轴排列的晶粒的基板超出了广泛研究的第一层的影响。

The epitaxial growth of single-crystalline-like organic multilayer films on selected metal surfaces, chosen to provide either weak or strong interactions at the hybrid interface, has been studied. In particular, while molecules containing heteroatoms form site-specific covalent bonds, the growth of oligoacenes on the Cu(110) surface is characterized by extended interfacial states and a flat molecular orientation in the first layer. On the contrary, for surfaces providing weak interactions like Bi(001) and silicene, both standing and flat orientations occur and are governed by the specific lattice-matching conditions for various crystallographic planes of the thin film crystals. The results provide a detailed understanding of the influence of the substrate beyond the widely studied first layer in achieving epitaxial growth and uniaxial alignment of the grains.