Journal Article

PreJuSER-16345

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Force-controlled lifting of molecular wires

Fournier, N. ; Wagner, C. ; Weiss, C. ; Temirov, R. ; Tautz, F. S.

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10924  doi:10.1103/PhysRevB.84.035435

Abstract: Lifting a single molecular wire off the surface with a combined frequency-modulated atomic force and tunneling microscope it is possible to monitor the evolution of both the wire configuration and the contacts simultaneously with the transport conductance experiment. In particular, critical points where individual bonds to the surface are broken and instabilities where the wire is prone to change its contact configuration can be identified in the force gradient and dissipation responses of the junction. This additional mechanical information can be used to unambiguously determine the conductance of a true molecular wire, that is, of a molecule that is contacted via a pointlike "crocodile clip" to each of the electrodes but is otherwise free.

Keyword(s): J

Note: We gratefully acknowledge fruitful discussions with M. Rohlfing (Universitat Osnabruck) and C. Toher (TU Dresden), as well as the financial support from the Deutsche Forschungsgemeinschaft (DFG SPP 1243). R. T. acknowledges support by the Helmholtz-Gemeinschaft.

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Contributing Institute(s):

1. Funktionale Nanostrukturen an Oberflächen (PGI-3)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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