[11]Anthrahelicene on InSb(001) c(8×2): A Low‐Temperature Scanning Probe Microscopy Study |
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| Authors: | Dr Jakub S Prauzner‐Bechcicki Szymon Godlewski Dr Janusz Budzioch Grzegorz Goryl Lukasz Walczak Dr Petr Sehnal Dr Irena G Stará Dr Ivo Starý Dr Francisco Ample Prof Christian Joachim Prof Marek Szymonski |
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| Institution: | 1. Centre for Nanometer‐Scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Reymonta 4, Krakow (Poland), Fax: (+48)?12?633?70?86;2. Departamento de Fisica de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid (Spain);3. Institute of Organic Chemistry and Biochemistry ASCR, Flemingovo nám. 2, 166 10 Prague 6 (Czech Republic);4. Centre d'Elaboration des Materiaux et d'Etudes Structurales, CEMES‐CNRS, 29 Rue J. Marvig, P.O. Box 94347, 31055 Tolouse Cedex 04 (France) |
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| Abstract: | The adsorption of individual 11]anthrahelicene molecules and their self‐assembly into monolayer islands on an InSb(001) c(8×2) reconstructed surface is studied with low‐temperature scanning probe microscopy. A racemic mixture is deposited on atomically flat terraces of InSb at room temperature. At lower coverage, the molecules tend to decorate atomic step edges of the substrate. At higher coverage, 11]anthrahelicene molecules form 2D islands. A quasi‐hexagonal ordering of molecules within the layer is identified. Furthermore, it is shown that molecules adsorb with the helical axis almost perpendicular to the substrate. Interference between tunneling through the molecular layer and directly through space is reported. Finally, experimental results are compared to those of theoretical calculations. |
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| Keywords: | chirality helical structures surface chemistry scanning probe microscopy semiconducting surfaces |
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