Contact Chemistry and Single-Molecule Conductance: A Comparison of Phosphines, Methyl Sulfides, and Amines
Journal of the American Chemical Society2007Vol. 129(51), pp. 15768–15769
Citations Over TimeTop 1% of 2007 papers
Young S. Park, Adam C. Whalley, Maria Kamenetska, Michael L. Steigerwald, Mark S. Hybertsen, Colin Nuckolls, Latha Venkataraman
Abstract
We compare the low bias conductance of a series of alkanes terminated on their ends with dimethyl phosphines, methyl sulfides, and amines and find that junctions formed with dimethyl phosphine terminated alkanes have the highest conductance. We see unambiguous conductance signatures with these link groups, indicating that the binding is well-defined and electronically selective. This allows a detailed analysis of the single-molecule junction elongation properties which correlate well with calculations based on density functional theory.
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