Cu-Adatom-Mediated Bonding in Close-Packed Benzoate/Cu(110)-Systems
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- 作者：M. Christina Lennartz ; Nicolae Atodiresei ; Lars Mller-Meskamp ; Silvia Karthuser ; Rainer Waser ; Stefan Blgel
- 刊名：Langmuir
- 出版年：2009
- 出版时间：January 20, 2009
- 年：2009
- 卷：25
- 期：2
- 页码：856-864
- 全文大小：501K
- 年卷期：v.25,no.2(January 20, 2009)
- ISSN：1520-5827
文摘
Using UHV-STM investigations and density-functional theory calculations we prove the contribution of Cu−adatoms to the stabilization of a new high-density phase of benzoate molecules on a Cu(110) substrate. We show that two different chemical species, benzoate and benzoate Cu−adatoms molecules, build the new close-packed structure. Although both species bind strongly to the copper surface, we identify the benzoate Cu−adatoms molecules as the more mobile species on the surface due to their reduced dipole moment and their lower binding energy compared to benzoate molecules. Therefore, the self-assembly process is supposed to be mediated by benzoate Cu−adatom species, which is analogous to the gold−thiolate species on Au(111) surfaces.