Adsorption and charge transfer dynamics of bi-isonicotinic acid on Au(111).
Adsorption and charge transfer dynamics of bi-isonicotinic acid on Au(111).
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双异烟酸在 Au(111) 上的吸附和电荷转移动力学。
DOI：
10.1063/1.2781510
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Schnadt
中科院分区：
文献类型：
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作者：
J. Taylor;Louise C. Mayor;J. C. Swarbrick;J. O'Shea;C. Isvoranu;J. Schnadt
利用电子能谱技术研究了双异烟酸(4,4（')-二羧基-2,2(')-联吡啶）与Au（111）表面的相互作用。近边缘x射线吸收精细结构（NEXAFS）光谱表明，分子的单层与表面平坦，并且单层对所采用的制备条件敏感。核能级x射线光电子能谱（XPS）表明，被吸附的分子在吸附过程中不发生去质子化。共振光发射的“核孔钟”实现被用于探测分子与衬底之间的耦合。该技术揭示了在n1s核能级电子的共振激发下从衬底到分子的超快回转移的可能性。这得到了NEXAFS和XPS对系统中能级排列的调查的支持。
The interaction of bi-isonicotinic acid (4,4(')-dicarboxy-2,2(')-bipyridine) with the Au(111) surface has been investigated using electron spectroscopic techniques. Near edge x-ray absorption fine structure (NEXAFS) spectra show that monolayers of the molecule lie flat to the surface and also reveal that the monolayer is sensitive to the preparation conditions employed. Core level x-ray photoelectron spectroscopy (XPS) shows that the adsorbed molecule does not undergo deprotonation upon adsorption. The "core-hole clock" implementation of resonant photoemission has been used to probe the coupling between molecule and substrate. This technique has revealed the possibility of ultrafast backtransfer from the substrate into the molecule upon resonant excitation of a N 1s core level electron. This is supported by a NEXAFS and XPS investigation of energy level alignments in the system.