SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 45: Focus Session: Scanning Probe Microscopy with Quartz Sensors I

O 45.2: Topical Talk

Mittwoch, 29. März 2023, 10:45–11:15, CHE 89

Single-molecule reactions performed and characterized using atomic force microscopy — •Leo Gross — IBM Research Europe - Zurich

Selective and reversible bond formation and dissociation can be controlled by tip-induced reduction-oxidation reactions on a surface. Molecular rearrangements leading to different constitutional isomers are selected by the polarity and magnitude of applied voltage pulses from the tip of a combined scanning tunneling microscope (STM) / atomic force microscope (AFM) [1].

Elusive molecules can be created and studied, such as cyclocarbons, i.e., molecular sp1 hybridized carbon allotropes [2] and molecules with high-spin ground states [3,4]. Moreover, insulating substrates allow probing charge states [5] and excited states [6].

References:

[1] F. Albrecht et al. Science. 377, 298-301 (2022).

[2] K. Kaiser et al. Science. 365, 1299-1301 (2019).

[3] N. Pavliček, et al. Nat. Nano. 12, 308-311 (2017).

[4] S. Mishra et al. ACS Nano. 16, 3264-3271 (2022).

[5] S. Fatayer et al. Science. 365, 142-145 (2019).

[6] S. Fatayer et al. Phys. Rev. Lett. 126, 176801 (2021).