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O: Fachverband Oberflächenphysik

O 60: Overview Talk: Leo Gross

O 60.1: Topical Talk

Mittwoch, 18. März 2020, 09:30–10:15, TRE Phy

On-surface reactions and charge transitions by atomic manipulation — •Leo Gross — IBM Research - Zurich, Säumerstr. 4, 8003 Rüschlikon, Switzerland

Molecules can be created using atomic manipulation to break and to form covalent bonds. High-resolution atomic force microscopy (AFM) with functionalized tips provides insights into the structure, geometry, aromaticity, charge states and bond-order relations of the molecules created and into the reactions performed [1]. Recently, we generated the molecular carbon allotrope cyclo[18]carbon and resolved its long debated structure [2].

On insulating substrates, we can control the charge state of molecules by deliberately attaching and detaching single electrons with the tip. We measured the reorganization energy of a molecule on an insulator [3] and resolved the changes within molecular geometry, adsorption and aromaticity related to its oxidation state [4].

References

[1] L. Gross et al. Angew. Chem Int. Ed 57, 3888 (2018)

[2] K. Kaiser et al. Science 365, 1299 (2019)

[3] S. Fatayer et al. Nat. Nano. 13, 376 (2018)

[4] S. Fatayer et al. Science 365, 142 (2019)