Electronic and geometric structure of the PTCDA/Ag(110) interface probed by angle-resolved photoemission
Electronic and geometric structure of the PTCDA/Ag(110) interface probed by angle-resolved photoemission
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DOI：
10.1103/physrevb.86.045417
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发表时间：
2012-07
影响因子：
3.7
通讯作者：
M. Wiessner;D. Hauschild;A. Schöll;F. Reinert;V. Feyer;K. Winkler;B. Krömker
中科院分区：
文献类型：
--
作者：
M. Wiessner;D. Hauschild;A. Schöll;F. Reinert;V. Feyer;K. Winkler;B. Krömker
分子膜的性质是由靠近界面的第一层的几何结构决定的。这些都与基材接触并感受到界面粘合的影响，特别是对于金属基材，这可能是实质性的。对于银（110）上的3,4,9,10-苝四羧酸二酐模型体系，可以通过制备参数改变第一层单分子膜的几何结构。这导致了第一层电子结构的显著差异。在这里，我们表明，通过角分辨光电子能谱与低能电子衍射相结合，我们不仅可以确定吸附质上层结构的界面层和单元胞的电子结构，还可以确定单元胞中分子的排列。此外，在双层膜中，我们可以区分第一层和第二层，从而研究第二层的形成及其对埋藏界面的影响。
The properties of molecular films are determined by the geometric structure of the first layers near the interface. These are in contact with the substrate and feel the effect of the interfacial bonding, which particularly, for metal substrates, can be substantial. For the model system 3,4,9,10-perylenetetracarboxylic dianhydride on Ag(110), the geometric structure of the first monolayer can be modified by preparation parameters. This leads to significant differences in the electronic structure of the first layer. Here, we show that, by combining angle-resolved photoelectron spectroscopy with low-energy electron diffraction, we cannot only determine the electronic structure of the interfacial layer and the unit cell of the adsorbate superstructure, but also the arrangement of the molecules in the unit cell. Moreover, in bilayer films, we can distinguish the first from the second layer and, thus, study the formation of the second layer and its influence on the buried interface.