Berlin 2015 – scientific programme
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O: Fachverband Oberflächenphysik
O 73: Nanostructures at Surfaces: 1D and 2D Structures
O 73.3: Poster
Wednesday, March 18, 2015, 18:15–21:00, Poster A
Investigation of nanoporous networks of para-hexaphenyl-dicarbonitrile on Au(111) with ultrahigh spatial resolution — •Leonid Solianyk1, Juan Carlos Moreno-Lopez1, Stefano Gottardi1, Kathrin Müller1, Tuan Anh Pham1, Fei Song1, Jun Li1, Leticia Monjas2, Anna Hirsch2, and Meike Stöhr1 — 1Zernike Institute for Advanced Materials, University of Groningen, The Netherlands — 2Stratingh Institute for Chemistry, University of Groningen, The Netherlands
The formation and investigation of molecular nanoarchitectures on well-defined inorganic surfaces is thought to be highly relevant for the development of future nanoelectronic devices. One way to obtain insight into the underlying interactions controlling molecular self-assembly is through ultrahigh spatial resolution on the submolecular scale.
In this work, the self-assembly of para-hexaphenyl-dicarbonitrile molecules was investigated on Au(111) with low temperature scanning tunneling microscopy (STM) and non-contact atomic force microscopy (nc-AFM) using functionalized CO tips. Two different nanoporous networks were observed for submonolayer coverages. The rhombic network stabilized by C-N...H bonds was found after molecular deposition at room temperature. Upon thermal annealing at 575K, a hexagonal network stabilized by metal-ligand interactions with native gold atoms formed. Due to the ultrahigh spatial resolution of nc-AFM, information on the intermolecular interactions could be directly obtained.