Tip-Induced $\beta$-Hydrogen Dissociation in an Alkyl Group Bound on Si(001)
| Autor: | Alexa Adamkiewicz, Ulrich Höfer, Marcel Reutzel, Tamam Bohamud, Michael Dürr |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Condensed Matter - Materials Science Materials science Hydrogen chemistry.chemical_element Chemical modification Condensed Matter Physics Cleavage (embryo) Dissociation (chemistry) law.invention Crystallography chemistry Covalent bond law General Materials Science Scanning tunneling microscope Alkyl Excitation |
| Popis: | Atomic-scale chemical modification of surface-adsorbed ethyl groups on Si(001) was induced and studied by means of scanning tunneling microscopy. Tunneling at sample bias > +1.5V leads to tip-induced C-H cleavage of a $\beta$-hydrogen of the covalently bound ethyl configuration. The reaction is characterized by the formation of an additional Si-H and a Si-C bond. The reaction probability shows a linear dependence on the tunneling current at 300 K; the reaction is largely suppressed at 50 K. The observed tip-induced surface reaction at room temperature is thus attributed to a one-electron excitation in combination with thermal activation. Comment: 5 pages, 5 figures, and Supporting Information |
| Databáze: | OpenAIRE |
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