Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 83: Surface Chemistry and Growth
O 83.5: Vortrag
Donnerstag, 19. März 2015, 11:30–11:45, MA 144
A chrysene derivative as a promising candidate for an on-surface chemical reaction studied by LT-STM/STS — •Frank Eisenhut1,2, Justus Krüger1,2, Jörg Meyer1,2, Robin Ohmann1,2, Gianaurelio Cuniberti1,2, and Francesca Moresco1,2 — 1Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany — 2Center for Advancing Electronics Dresden, TU Dresden, 01062 Dresden, Germany
On-surface chemistry of π-conjugated carbon-systems become more and more relevant as these systems are interesting for the use in molecular electronic devices. In this study the promising molecule tetra- methyldibenzochrysene has been investigated. The desired reaction for this molecule is a dehydrogenation of the methyl groups and subsequently a closing of carbon rings, to form dimethylphenantroperylene. This study deals with the characterization of the initial molecule via scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) at low temperatures on Ag(100). After the adsorption of the chrysene to the surface, the molecule forms supramolecular assemblies consisting 3 or 4 molecules. Detailed topographic and spectroscopic analysis of the assemblies have been fulfilled. Further the influence of applying voltage pulses to the assemblies and the heating of the system at different temperatures has been investigated.