Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 77: Focussed Session: Towards a Quantitative Understanding of Complex Adsorption Structures: Surface Science goes Organic III

O 77.8: Vortrag

Donnerstag, 3. April 2014, 18:00–18:15, TRE Phy

Quantifying molecule-surface interactions using AFM-based single-molecule manipulation — •Christian Wagner1,2, Norman Fournier1, Victor G. Ruiz3, Chen Li4, Michael Rohlfing5, Alexandre Tkatchenko3, F. Stefan Tautz1, and Ruslan Temirov11Forschungszentrum Jülich, Jülich, Germany — 2Universiteit Leiden, Leiden, The Netherlands — 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 4Max-Planck-Institut für Polymerforschung, Mainz, Germany — 5Universität Münster, Münster, Germany

Scanning probe microscopy plays an important role in the investigation of molecular adsorption. Promising is the possibility to probe the molecule-surface interaction while tuning its strength through AFM tip-induced single-molecule manipulation. Here, we outline a strategy to achieve quantitative understanding of such manipulation experiments [1,2]. The example of qPlus sensor based 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) molecule lifting experiments is used to demonstrate how different aspects of the molecule-surface interaction, namely the short-range adsorption potential [2], the asymptotic van der Waals potential, and local chemical bonds which are the source of the surface corrugation can be quantified by the help of force-field simulations.

[1] N. Fournier et al., Phys. Rev. B 84, 035435 (2011)
[2] C. Wagner et al., Phys. Rev. Lett. 109, 076102 (2012)

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