Conductance values of alkanedithiol molecular junctions

Details Conductance values of alkanedithiol molecular junctions Conductance values of alkanedithiol molecular junctions

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10f5018g&link_type=abstract

New Journal of Physics, Volume 10, Issue 6, pp. 065018 (2008).

Physics

5

Scientific paper

We study the electrical conductance of octanedithiol molecular junctions using a mechanically controllable break-junction setup. The stability of the system allows control of whether the electrodes get into contact before each new molecular junction formation or not (contact and non-contact modes). We find three characteristic conductance values for octanedithiol. Well-defined peaks in the conductance histograms at multiples of 1.2×10-5 G0 suggest that this value corresponds to the conductance of a single molecular junction conductance. Reproducible features are also observed at 4.5×10-5 and 2.3×10-4 G0. The first value has the strongest statistical weight, whereas the second is only observed in the non-contact mode. We propose that these two values reflect the formation of several molecular junctions in parallel between the electrodes.

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