Long-Range Order in an Organic Overlayer Induced by Surface Reconstruction: Coronene on Ge(111)

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• 作者：Jes煤s Mart铆nez-Blanco ; Benjamin Walter ; Arantzazu Mascaraque ; Karsten Horn
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：June 5, 2014
• 年：2014
• 卷：118
• 期：22
• 页码：11699-11703
• 全文大小：366K
• 年卷期：v.118,no.22(June 5, 2014)
• ISSN：1932-7455

文摘

Using scanning tunneling microscopy, we show that coronene molecules form supramolecular structures upon room-temperature deposition on Ge(111), in full commensurability with the c(2 脳 8) reconstruction of the clean surface. The molecules are not adsorbed in a planar manner in the first layer; the balance between lateral intermolecular interactions and directional bonding to the surface forces them into a tilted configuration. Further coronene deposition leads to the formation of large domains of weakly bonded molecules adsorbed on top of the first layer. The ordering of the second layer is dictated by both, the first layer of molecules and the unaltered reconstructed substrate underneath. We provide a detailed analysis of the encountered molecular periodicities and discuss the mechanisms that lead to long-range ordering in these layers.