Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 50: P15: Polymers and Fields

CPP 50.6: Poster

Mittwoch, 18. März 2015, 10:00–13:00, Poster A

A scanning force microscopy study of the growth of organic molecules on Au(111) — •Kushtrim Bytyqi, Sebastian Schneider, Michael Marz, Carmen Pérez León, and Regina Hoffmann-Vogel — Karlsruher Institut für Technologie, Physikalisches Institut, D-76131 Karlsruhe

Recently, J. Cai et al. succeeded in the fabrication of graphene nanoribbons (GNRs) on the crystalline surface of noble metals via on-surface chemical synthesis [1]. They showed that armchair edge GNRs can be grown on Au(111) using 10,10’-dibromo-9,9’-bianthryl (DBBA) as precursor molecules following a three-step process [1,2].
We have investigated the ordering of DBBA molecules on Au(111) by frequency modulation scanning force microscopy at room temperature (RT) in ultrahigh vacuum. The molecules were evaporated on clean Au(111). During deposition, the substrate was either kept at RT and subsequently annealed to ∼ 200^∘C, or was preheated to ∼ 200^∘C. The coverage of the molecules was modified by varying the evaporation time. We have observed different molecular configurations depending on the experimental conditions. Among others, we imaged molecular islands with a stripe-like ordering apparently consisting of two distinct phases.

J. Cai et al., Nature 466, 470 (2010).
van der Lit et al., Nature Commun. 4, 2013 (2013).