SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 28: Organic Molecules on Inorganic Substrates III: Adsorption and Growth I
O 28.7: Talk
Tuesday, March 28, 2023, 12:00–12:15, CHE 89
Electronic properties of radical helicene molecules on metallic substrates — •Aleš Cahlík1, Danyang Liu1, Carolina A. Marques1, Ya-Chu Hsieh2, Yao-Ting Wu2, Karl-Heinz Ernst3, and Fabian D. Natterer1 — 1Department of Physics, UZH, Zurich, Switzerland — 2Department of Chemistry, National Cheng Kung University, Tainan, Taiwan — 3Molecular Surface Science Group, EMPA, Zurich, Switzerland
Helicenes are π-conjugated aromatic compounds with helical shape arising from angularly fused aromatic rings. Radical helicenes combine unpaired electron spins with structural chirality and a π-conjugated framework that can offer intriguing prospects to study the synergy of electronic transport, magnetism and photoactivity. In our work, we employ STM and nc-AFM to investigate an open-shell biradical helicene that we adsorb onto metallic substrates, including magnetic nanoislands. Notably, we observe a Kondo resonance pointing towards the preservation of the open-shell character upon deposition onto Au(111).