Depositing Molecular Graphene Nanoribbons on Ag(111) by Electrospray Controlled Ion Beam Deposition: Self‐Assembly and On‐Surface Transformations
Wei Ran, Andreas Walz, Karolina Stoiber, Peter Knecht, Hongxiang Xu, Anthoula C. Papageorgiou, Annette Huettig, Diego Cortizo‐Lacalle, Juan P. Mora‐Fuentes, Aurelio Mateo‐Alonso, Hartmut Schlichting, Joachim Reichert, Johannes V. Barth
Abstract
The chemical processing of low-dimensional carbon nanostructures is crucial for their integration in future devices. Here we apply a new methodology in atomically precise engineering by combining multistep solution synthesis of N-doped molecular graphene nanoribbons (GNRs) with mass-selected ultra-high vacuum electrospray controlled ion beam deposition on surfaces and real-space visualisation by scanning tunnelling microscopy. We demonstrate how this method yields solely a controllable amount of single, otherwise unsublimable, GNRs of 2.9 nm length on a planar Ag(111) surface. This methodology allows for further processing by employing on-surface synthesis protocols and exploiting the reactivity of the substrate. Following multiple chemical transformations, the GNRs provide reactive building blocks to form extended, metal-organic coordination polymers.