Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.24: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

Bond formation between single molecules on ultrathin insulating films — •Niko Pavliček, Tobias Sonnleitner, Ingmar Swart, and Jascha Repp — Institute of Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany

Scanning tunneling microscopy (STM) and spectroscopy (STS) studies on very thin insulating films have shown to be powerful tools in atomic-scale science [1]. These techniques have opened up exciting possibilities by enabling the investigation of the unperturbed electronic properties of single molecules [2] and artificial engineered structures.

Aromatic hydrocarbons with large delocalized π-systems are promising as functional building blocks for future molecular electronics. Consequently, bond formation between individual organic molecules is essential. First achievements in this field were the imaging of bond formation between pentacene molecules and gold atoms [3], and the formation of coordination-bonded complexes [4].

Here, we present STM and STS studies of molecules comprising nitrile groups, which facilitate the formation of direct molecule-molecule bonds, adsorbed on ultrathin insulating films. We demonstrate such synthesis, characterization, and subsequent manipulation of anthracenedicarbonitrile dimers using the STM tip.

[1] J. Repp and G. Meyer, Applied Physics A 85, 399 (2006).

[2] J. Repp et al., Physical Review Letters 95, 225503 (2005).

[3] J. Repp et al., Science 312, 1196 (2006).

[4] P. Liljeroth et al., submitted (2009).