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arXiv 1209.3880cond-mat.mtrl-scicond-mat.mes-hallphysics.chem-ph
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有机-金属界面价带光电子能谱的解释

On the interpretation of valence band photoemission spectra at organic-metal interfaces

L. Giovanelli, F. C. Bocquet, P. Amsalem, H. -L. Lee, M. Abel, S. Clair, M. Koudia, T. Faury, L. Petaccia, D. Topwal, E. Salomon, T. Angot, A. A. Cafolla, N. Ko… 展开作者

L. Giovanelli, F. C. Bocquet, P. Amsalem, H. -L. Lee, M. Abel, S. Clair, M. Koudia, T. Faury, L. Petaccia, D. Topwal, E. Salomon, T. Angot, A. A. Cafolla, N. Koch, L. Porte, A. Goldoni, J. -M. Themlin

摘要:

有机分子在取向良好的单晶钴金属表面的吸附对紫外光电子能谱学的能量分布曲线有着重要的影响。在原始金属的光谱中不存在的新特征可以被分配为具有一定程度的分子-基底杂化的“界面态”。在这里,它表明,具有分子轨道特性的界面状态可以很容易地被识别为孤立的功能以上的无特征基板SP-平台在低结合能。在另一方面,必须采取更多的照顾分配吸附诱导功能时,这些谎言的d-波段光谱区域内的基板。事实上,通常被解释为分子-衬底相互作用的特征的特征实际上可能是由被吸附物散射的衬底光电子引起的。这种现象是通过一系列的例子,贵金属单晶表面覆盖的大π共轭有机分子的单层。

英文摘要:

Adsorption of organic molecules on well-oriented single crystal coinage metal surfaces fundamentally affects the energy distribution curve of ultra-violet photoelectron spectroscopy spectra. New features not present in the spectrum of the pristine metal can be assigned as "interface states" having some degree of molecule-substrate hybridization. Here it is shown that interface states having molecular orbital character can easily be identified at low binding energy as isolated features above the featureless substrate sp-plateau. On the other hand much care must be taken in assigning adsorbate-induced features when these lie within the d-band spectral region of the substrate. In fact, features often interpreted as characteristic of the molecule-substrate interaction may actually arise from substrate photoelectrons scattered by the adsorbates. This phenomenon is illustrated through a series of examples of noble-metal single-crystal surfaces covered by monolayers of large pi-conjugated organic molecules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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