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Fullerene-Based Anchoring Groups for Molecular Electronics

Author(s):

Christian A. Martin, Dapeng Ding, Jakob Kryger Sørensen, Thomas Bjørnholm, Jan M. van Ruitenbeek, Herre S. J. van der Zant

Journal:

Journal of the American Chemical Society

Year:

2008

Volume:

130

Pages

13198-13199

DOI:

10.1021/ja804699a

Abstract:

We present results on a new fullerene-based anchoring group for molecular electronics. Using lithographic mechanically controllable break junctions in vacuum we have determined the conductance and stability of single-molecule junctions of 1,4-bis(fullero[c]pyrrolidin-1-yl)benzene. The compound can be self-assembled from solution and has a low-bias conductance of 3 × 10−4 G0. Compared to 1,4-benzenedithiol the fullerene-anchored molecule exhibits a considerably lower conductance spread. In addition, the signature of the new compound in histograms is more significant than that of 1,4-benzenediamine, probably owing to a more stable adsorption motif. Statistical analyses of the breaking of the junctions confirm the stability of the fullerene−gold bond.

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