Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 91: Nanostructures at Surfaces: Molecular Systems I

O 91.5: Vortrag

Donnerstag, 23. März 2017, 11:30–11:45, REC/PHY C213

Control of charge states within a single molecule — •Jan Berger1, Oleksandr Stestovych1, Martin Ondráček1, Martin Švec1, Irena G. Stará2, Ivo Starý2, and Pavel Jelínek11Insitute of Physics, ASCR, Prague, Czech republic — 2Institute of Organic Chemistry and Biochemistry ASCR, Prague, Czech republic

The field of molecular electronics aims at using a single molecule as building block for electronic devices. Ferrocene-based molecules are extremely appealing as they offer prospects of having a built-in charging functionality. They are known of being stable under redox states and therefore promising as candidates for quantum cellular automata units. Previous works demonstrated charging single metal adatoms [1], molecules or their clusters on insulating films [2] as well as charging of large self-assembled islands of molecules by STM or nc-AFM. [3]

Here we will present experimental evidence of controlling multiple charge states on a single 3,6,3',6'-tetraferrocene-9,9'bis-fluorenylidene, deposited on thin insulating NaCl film, by means of nc-AFM. We succeed to control the multiple charge states within a single molecule including reversible transitions between them. The induced charged states have prominent fingerprints in both the frequency shift and dissipation channels. Moreover, we demonstrate that the charge states can be modified by presence of neighboring charged molecules.

[1]J. Repp et al., Science 305, 493 (2004) [2]W. Steurer et al., Nature Comm. 6:8353 (2015). [3]P. Rahe et al., Nano Letters 2, 16 (2016)

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