Berwanger, Julian and Polesya, Svitlana and Mankovsky, Sergiy and Ebert, Hubert and Giessibl, Franz J. (2020) Atomically Resolved Chemical Reactivity of Small Fe Clusters. PHYSICAL REVIEW LETTERS, 124 (9): 096001. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
Small metal clusters have been investigated for decades due to their beneficial catalytic activity. It was found that edges are most reactive and the number of catalytic events increases with the cluster's size. However, a direct measurement of chemical reactivity of individual atoms within the clusters has not been reported yet. We combine the high-resolution capability of CO-terminated tips in scanning probe microscopy with their ability to probe chemical binding forces on single Fe atoms to study the chemical reactivity of atom-by-atom assembled Fe clusters from 1 to 15 atoms on the atomic scale. We find that the chemical reactivity of individual atoms within flat Fe clusters does not depend on the cluster size but on the coordination number of the investigated atom. Furthermore, we explain the atomic contrast of the investigated Fe clusters by relating the force spectra of individual atoms with atomic force microscopy images of the clusters.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FORCE MICROSCOPY; SURFACE; IRON; METAL; CO; IDENTIFICATION; CATALYSIS; SITES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Mar 2021 09:23 |
| Last Modified: | 29 Mar 2021 09:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44963 |
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