Regensburg 2019 – wissenschaftliches Programm
KFM 5: Instrumentation for Micro-/Nano-Analysis and Lithography/Structuring (joint session KFM/DS/O)
KFM 5.1: 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 .
We created radicals, diradicals , non-Kekulé molecules , anti-aromatics , and polyynes  and studied their structural and electronic properties. We recently showed that the reorganization energy of a molecule on an insulator can be determined . In addition, we expanded the toolbox for the synthesis of molecules by atomic manipulation, demonstrating reversible cyclisation reactions , skeletal rearrangements  and controlled reactions on insulating substrates by electron attachment/detachment .
References:  L. Gross et al. Angew. Chem Int. Ed 57, 3888 (2018).  B. Schuler et al. Nat. Chem. 8, 220 (2016).  N. Pavliček et al. Nat. Nano. 12, 308 (2017).  Z. Majzik et al. Nat. Commun. 9, 1198 (2018).  N. Pavliček et al. Nat. Chem. 10, 853 (2018).  S. Fatayer et al. Nat. Nano. 13, 376 (2018).  S. Fatayer et al. Phys. Rev. Lett. 121, 226101 (2018).