Insight into the unit cell: Structure of picene thin films on Ag(100) revealed with complementary methods.
Insight into the unit cell: Structure of picene thin films on Ag(100) revealed with complementary methods.
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DOI：
10.1063/1.4966200
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发表时间：
2016-11
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通讯作者：
Tobias Huempfner;Martin Hafermann;Christian Udhardt;F. Otto;R. Forker;T. Fritz
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作者：
Tobias Huempfner;Martin Hafermann;Christian Udhardt;F. Otto;R. Forker;T. Fritz
我们研究了在Ag（100）表面上的单分子层的分子结构。低能电子衍射和扫描隧道显微镜的实验表明，分子排列在一个高度有序的方式表现出一个点上线外延与两个不同的排列分子每个单元电池。比较测量的和模拟的光电子动量图允许进一步的结论的组成的单位电池。结构基础由两个平行的分子组成;一个分子面对面，另一个分子围绕其长轴相对于表面法线倾斜约45°。
We study the molecular structure of one monolayer of picene on a Ag(100) surface. Low energy electron diffraction and scanning tunneling microscopy experiments show that the molecules arrange in a highly ordered manner exhibiting a point-on-line epitaxy with two differently arranged molecules per unit cell. Comparing measured and simulated photoelectron momentum maps allows further conclusions about the composition of the unit cell. The structural basis consists of two parallel molecules; one molecule lies face-on and the other is tilted by ≈45° around its long axis with respect to the surface normal.