Regensburg 2019 – scientific programme
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O: Fachverband Oberflächenphysik
O 18: Poster Monday: Nanostructures
O 18.6: Poster
Monday, April 1, 2019, 17:45–20:00, Poster F
Simulating organic functionalization of Si(553)-Au — •Conor Hogan1, Svetlana Suchkova2, Friedhelm Bechstedt3, Eugen Speiser2, Sandhya Chandola2, and Norbert Esser2 — 1Istituto di Struttura della Materia-CNR (ISM-CNR), Rome, Italy — 2Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V. Berlin — 3Friedrich-Schiller-Universität Jena
Stepped gold-stabilized Si(553) surfaces offer much potential for self-organized assembly of one- and two-dimensional nanostructured arrays of organic molecules [1]. Regular atomic chains of Au and Si on the surface, running parallel to the step edges, act as natural templates for ordered organic functionalization. Strong covalent bonding to the semiconductor substrate determines that layer formation is controlled by the local surface reactivity. In this theoretical study we investigate the adsorption of various simple organic molecules with different functional groups on Si(553)-Au [2]. In particular we investigate the role of the functional group on the final geometry and electronic structure and show that hydrogen co-doping offers a means to tune the local reactivity [3].
[1] S. Suchkova, C. Hogan, F. Bechstedt, E. Speiser, N. Esser, Phys. Rev. B 97, 045417 (2018). [2] C. Hogan, S. Suchkova, F. Bechstedt, E. Speiser, S. Chandola, N. Esser, submitted. [3] C. Hogan, E. Speiser, S. Chandola, S. Suchkova, J. Aulbach, J. Schäfer, S. Meyer, R. Claessen, and N. Esser, Phys. Rev. Lett. 120, 166801 (2018).