Surface Structure and Electron Transfer Dynamics of the Self-Assembly of Cyanide on Au{111}

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• 作者：Andrew I. Guttentag ; Tobias Wächter ; Kristopher K. Barr ; John M. Abendroth ; Tze-Bin Song ; Nichole F. Sullivan ; Yang Yang ; David L. Allara ; Michael Zharnikov ; Paul S. Weiss
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：December 1, 2016
• 年：2016
• 卷：120
• 期：47
• 页码：26736-26746
• 全文大小：577K
• ISSN：1932-7455

文摘

A vibronic resonance between Au{111} surface states and adsorbed CN vibrations has been predicted, which we target for study. We have formed stable monolayers of cyanide on Au{111} and observe a hexagonal close-packed lattice with a nearest neighbor distance of 3.8 ± 0.5 Å. Cyanide orients normal to the surface attached via a Au–C bond. We show that the substrate–molecule coupling is particularly strong, leading to ultrafast electron transfer from the cyanide molecules to the Au{111} substrate as measured by resonant Auger spectroscopy using the core–hole clock method. The CN/Au{111} system is a simple example of a strongly interacting adsorbate–substrate system and will be the subject of a number of further studies, as discussed.