Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 17: Adsorption on Metal Surfaces
O 17.6: Vortrag
Montag, 7. März 2016, 16:15–16:30, H6
Controlled Intermolecular Coupling in Charging Processes of Molecular Assemblies — •Nemanja Kocić1, Dominik Blank1, Silvio Decurtins2, Shi-Xia Liu2, and Jascha Repp1 — 1Institute of Experimental and Applied Physics, University of Regensburg, 93053 Regensburg, Germany — 2Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland
In a recent study, we found that electron-acceptor molecules located at the edges of the self-assembled islands on the Ag(111) surface can be switched in their charge state by means of the electrostatic field inside a scanning tunneling microscope junction [1]. Here, we show that controlled vacancy formation by means of STM-based manipulation techniques allows to convert molecules inside the islands to edge-like molecules and thereby to create different pattern of molecules that show charge switching. Whereas simple electrostatic effects lead to different switching fields for different arrangements, in addition, very complex charging pattern originate from strong coupling between charge states of the molecules. Thereby, our work demonstrates that very complex functionality can be encoded into only few interacting molecules and might be a first step towards molecule-based cellular automata.
[1] N. Kocić et al., Nano Lett. 15, 4406 (2015)