Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 9: Instrumentation Micro-/Nano-Analysis and Lithography/Structuring: Invited Talk Leo Gross (joint session KFM/DS/O)

O 9.1: Hauptvortrag

Montag, 1. April 2019, 15:00–15:30, PHY 5.0.21

On-surface synthesis by atomic manipulation studied with AFM — •Leo Gross — IBM Research - Zurich, Säumerstr. 4, 8003 Rüschlikon, Switzerland

Elusive molecules can be created using atomic manipulation with a combined atomic force/scanning tunneling microscope (AFM/STM). Molecules that are highly reactive and short-lived under ambient conditions can be stabilized at low temperature on inert surfaces. Employing high-resolution AFM with functionalized tips provides insights into the structure, geometry, aromaticity and bond orders of the molecules created and into the reactions performed [1].

We created radicals, diradicals [2], non-Kekulé molecules [3], anti-aromatics [4], and polyynes [5] and studied their structural and electronic properties. We recently showed that the reorganization energy of a molecule on an insulator can be determined [6]. In addition, we expanded the toolbox for the synthesis of molecules by atomic manipulation, demonstrating reversible cyclisation reactions [2], skeletal rearrangements [5] and controlled reactions on insulating substrates by electron attachment/detachment [7].

References: [1] L. Gross et al. Angew. Chem Int. Ed 57, 3888 (2018). [2] B. Schuler et al. Nat. Chem. 8, 220 (2016). [3] N. Pavliček et al. Nat. Nano. 12, 308 (2017). [4] Z. Majzik et al. Nat. Commun. 9, 1198 (2018). [5] N. Pavliček et al. Nat. Chem. 10, 853 (2018). [6] S. Fatayer et al. Nat. Nano. 13, 376 (2018). [7] S. Fatayer et al. Phys. Rev. Lett. 121, 226101 (2018).