Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)

O 58.53: Poster

Mittwoch, 13. März 2013, 18:15–21:45, Poster B1

Heat transfer through a single molecule — •Nils Könne, Ludwig Worbes, David Hellmann, Konstantin Kloppstech, and Achim Kittel — EHF, Fak. V, Physik, Carl von Ossietzky Universität Oldenburg

The measurement of the molecular heat transfer at the single molecule level has attracted a lot of interest in recent years [1]. To measure this phenomenon with high spatial resolution we use our self-developed near field scanning thermal microscope (NSThM). Hence we are able to simultaneously detect the electron and heat transfer through a single molecule under ultra-high vacuum conditions. The conductions measurements are done for different temperature and potential differences within an Au-octanedithiol-Au junction using the NSThM-break junction technique. We have proven our concept by repeatedly retract the tip from the octanedithiol covered surface and record the distance dependency of the conductance which partially exhibit a step like behaviour. The histogram of these conduction steps reveals the commonly known [2] low conduction value of 1 nS for a single octanedithiol. [1] Yonatan Dubi and Massimiliano Di Ventra, Rev. Mod. Phys. 83, 131 (2011). [2] Wolfgang Haiss et al, J. Phys. Chem. C 113, 5823-5833 (2009).