Line-on-Line Organic-Organic Heteroepitaxy of Quaterrylene on Hexa-peri-hexabenzocoronene on Au(111)
Line-on-Line Organic-Organic Heteroepitaxy of Quaterrylene on Hexa-peri-hexabenzocoronene on Au(111)
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DOI：
10.1021/la901760j
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发表时间：
2009-11-03
期刊：
影响因子：
3.9
通讯作者：
Fritz, Torsten
中科院分区：
文献类型：
--
作者：
Kasemann, Daniel;Wagner, Christian;Fritz, Torsten
在最近的一篇论文中，我们讨论了由高度有序的四萘嵌苯 (QT) 单层组成的异质结构的光学特性，该异质结构通过预沉积的六邻六苯并苯 (HBC) 外延单层与金基板进行电子解耦。在这里，我们现在介绍这种有机双层系统的详细结构研究。我们证明异质体系的结构可以被识别为线对线重合（lol），这是我们之前在高取向热解石墨（HOPG）上的HBC上发现的3,4,9,10-苝四甲酸二酐（PTCDA）体系的一种新型外延。此外，我们根据先进的势能计算提供了证据，证明能量增益确实驱动了这种哈哈生长模式。
In a recent paper, we discussed the optical properties of a heterostructure consisting of a highly ordered monolayer of quaterrylene (QT), electronically decoupled from the gold substrate by a predeposited epitaxial monolayer of hexa-peri-hexabenzocoronene (HBC). Here we now present the detailed structural investigation of this organic double-layer system. We show that the structure of the heterosystem can be identified as line-on-line coincidence (lol), a new type of epitaxy discovered by us previously for the system 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) on HBC on highly oriented pyrolytic graphite (HOPG). Additionally, we provide evidence on the basis of advanced potential energy calculations that indeed energetic gain drives this lol growth mode.