Nitrogen Substitution Impacts Organic-Metal Interface Energetics
Nitrogen Substitution Impacts Organic-Metal Interface Energetics
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氮替代影响有机金属界面能量学
DOI：
10.1103/physrevb.94.155426
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and S.Duhm
中科院分区：
文献类型：
--
作者：
A. Yang;A. Canellas;M. Sato;B. Wang;R.-B. Wang;H. Koike;I. Salzmann;P. K.Thakur;T.-L. Lee;L.-J. Liu;S.Kera;A. Gerlach;K. Kanai;J. Fan;F. Schreiber;and S.Duhm
利用逆光电子能谱、紫外光电子能谱（UPS）、x射线光电子能谱（XPS）、低能电子衍射（LEED）和x射线驻波（XSW）技术研究了在Au（111）、Ag（111）和Cu（111）基体上真空升华的7、8、15、16-四叠氮二烯（TAT）薄膜的结构和电子性能。LEED揭示了这三种基底上单层TAT的平坦吸附几何形状，这与XSW结果一致。在所有三种底物上，分子在单层中略有扭曲，氮原子比碳原子具有更小的平均键距。在Ag（111）和Cu（111）上，化学吸附发生了净电子从底物转移到吸附质的过程，正如UPS和XPS所证明的那样。结合这些结果，我们充分了解了电子性质与界面几何形状之间的关系。
We investigated the structural and electronic properties of vacuum sublimed 7,8,15,16-tetraazaterrylene (TAT) thin films on Au(111), Ag(111), and Cu(111) substrates using inverse photoemission spectroscopy, ultraviolet photoelectron spectroscopy (UPS), x-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED), and the x-ray standing wave (XSW) technique. The LEED reveals a flat adsorption geometry of the monolayer TAT on these three substrates, which is in accordance with the XSW results. The molecules are slightly distorted in monolayers on all three substrates with the nitrogen atoms having smaller averaged bonding distances than the carbon atoms. On Ag(111) and Cu(111), chemisorption with a net electron transfer from the substrate to the adsorbate takes place, as evidenced by UPS and XPS. Combining these results, we gain full insight into the correlation between electronic properties and interface geometry.