Description:

A pseudo one-dimensional molecular electronic network consisting of segments of gold nanowires separated by 1-3 nm wide gaps and interconnected by organic molecules [thiol endcapped oligo(phenenylenevinylene)s (OPVs, 1.3 nm - 1.9 nm long)] has been fabricated by lipid templated self-assembly. The electronic properties of the networks have been characterized in three situations in which: (i) only lipid molecules reside in the gap between gold wire segments or (ii) OPV molecules which are too short to bridge the gap or (iii) OPV molecules that are long enough to bridge the gap. The resulting network conductivity increases by 2-3 orders of magnitude with increasing covalent contact between OPV molecules and electrodes.

Shown is an AFM image of a selected gold wire. The resistance of the wire is measured at selected distances (marked by black cross) from the prefabricated gold electrode, which is situated in the left of the image.
 

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