Electronic structure of 1,3,5,7-cyclooctatetraene chemisorbed on Si(001)-2×1 at 300 K studied by PES, NEXAFS, and resonant valence band spectroscopy
Electronic structure of 1,3,5,7-cyclooctatetraene chemisorbed on Si(001)-2×1 at 300 K studied by PES, NEXAFS, and resonant valence band spectroscopy
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通过 PES、NEXAFS 和共振价带光谱研究 300 K 下化学吸附在 Si(001)-2×1 上的 1,3,5,7-环辛四烯的电子结构
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发表时间：
2002
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影响因子：
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通讯作者：
F. Sirotti
中科院分区：
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作者：
F. Rochet;F. Bournel;A. Gallet;G. Dufour;L. Lozzi;F. Sirotti
用同步辐射核能级光谱研究了300 K时反芳香分子1，3，5，7-环辛四烯在Si（001）-2 1上的电子结构. Si 2 p和C 1 s光电子能谱（PES）用于跟踪硅表面态的反应和Si-C键的形成。C 1 s近边X射线吸收精细结构（NEXAFS）光谱表明，p键存活后化学吸附。自由p键的取向顺序推导出NEXAFS光谱的角度依赖性，在一个单一的域（邻位）表面上进行，这项研究表明，实际上通过的化学吸附分子的多个吸附几何形状。最后，共振价带光谱给出的结合能位置的化学吸附剂，信息可能是有用的扫描隧道显微镜图像的解释被占用的p带。
The electronic structure of 1,3,5,7-cyclooctatetraene, an antiaromatic molecule, adsorbed on Si(001)-2×1 at 300 K has been investigated by a combination of core-level spectroscopies using synchrotron radiation. Si 2p and C 1s photoemission spectroscopy (PES) are used to follow the reaction of silicon surface states and the formation of Si−C bonds. C 1s near-edge X-ray absorption fine structure (NEXAFS) spectroscopy shows that p bonds survive after chemisorption. The orientational order of the free p bonds is deduced from the angular dependence of the NEXAFS spectra; performed on a single domain (vicinal) surface, this study indicates that multiple adsorption geometries are actually adopted by the chemisorbed molecules. Finally, resonant valence band spectroscopy gives the binding energy position of the occupied p band of the chemisorbates, information that may be useful for the interpretation of scanning tunneling microscopy images.