Dresden 2020 – scientific programme

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O: Fachverband Oberflächenphysik

O 117: Graphene II: Adsorption, Intercalation and Doping (joint session O/TT)

O 117.7: Talk

Friday, March 20, 2020, 12:00–12:15, GER 37

Monodispersed graphene nanoribbons on Ag(111) by electrospray controlled ion beam deposition: their self-assembly and on-surface extension visited by STM — •Wei Ran¹, Andreas Walz¹, Karolina Stoiber¹, Peter Knecht¹, Anthoula C. Papageorgiou¹, Annette Huettig¹, Diego Cortizo-Lacalle², Juan P. Mora-Fuentes², Aurelio Mateo-Alonso^2,3, Hartmut Schlichting¹, Joachim Reichert¹, and Johannes V. Barth¹ — ¹Physics Department E20, Technical University of Munich, Germany — ²POLYMAT, University of the Basque Country UPV/EHU, Spain — ³Ikerbasque, Basque Foundation for Science, Bilbao, Spain

Graphene nanoribbons (GNRs) are of interest due to their potential in electronics, energy conversion, and storage. For atomically precise GNRs, elaborate bottom-up fabrication protocols have been developed, utilising the reactivity of a metallic support.¹ However this approach often results in GNR arrays with a variety of lengths. Here we employ a different approach for the preparation and study of GNRs on surfaces: chemical synthesis and purification of well-defined nanoribbons² followed by processing with electrospray controlled ion beam deposition (ES-CIBD). With this method, we can deposit well-defined GNRs on any solid support under ultra-high vacuum conditions. The quality of the films produced is exemplified for a ∼ 3 nm GNR on Ag(111). We explore their self-assembly and thermally activated polymerisation reactions by means of scanning tunnelling microscopy.

1) Fasel et al. Adv. Mater. 2016, 28, 6222.

2) Mateo-Alonso et al. Angew. Chem., Int. Ed. 2018, 57, 703.