| Autor: |
Zimmermann, Petr, Sobotík, Pavel, Kocán, Pavel, Ošt'ádal, Ivan, Vorokhta, Mykhailo, Acres, Robert George, Matolín, Vladimír |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 2016, Vol. 145 Issue 9, p1-7, 7p, 3 Diagrams, 1 Chart, 4 Graphs |
| Abstrakt: |
Interaction of ethylene (C2H4) with Si(001)-Sn-2 × 2 and Si(001)-In-2 × 2 at room temperature has been studied using core level (C 1s) X-ray photoelectron spectroscopy with synchrotron radiation and scanning tunneling microscopy. Sn and In form similar dimer chains on Si(001)2 × 1, but exhibit different interaction with ethylene. While ethylene adsorbs on top of Sn dimers of the Si(001)-Sn-2 × 2 surface, the Si(001)-In-2 × 2 surface turned out to be inert. Furthermore, the reactivity of the Sn terminated surface is found to be considerably decreased in comparison with Si(001)2 × 1. According to the proposed adsorption model ethylene bonds to Sn dimers via [2 + 2] cycloaddition by interacting with their π dimer bonds. In contrast, indium dimers do not contain π bonds, which renders the In terminated Si(001) surface inert for ethylene adsorption. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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