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Single-Molecule Circuits with Well-Defined Molecular Conductance
Open accessAbstract
We measure the conductance of amine-terminated molecules by breaking Au point contacts in a molecular solution at room temperature. We find that the variability of the observed conductance for the diamine molecule-Au junctions is much less than the variability for diisonitrile- and dithiol-Au junctions. This narrow distribution enables unambiguous conductance measurements of single molecules. For an alkane diamine series with 2-8 carbon atoms in the hydrocarbon chain, our results show a systematic trend in the conductance from which we extract a tunneling decay constant of 0.91 +/- 0.03 per methylene group. We hypothesize that the diamine link binds preferentially to undercoordinated Au atoms in the junction. This is supported by density functional theory-based calculations that show the amine binding to a gold adatom with sufficient angular flexibility for easy junction formation but well-defined electronic coupling of the N lone pair to the Au. Therefore, the amine linkage leads to well-defined conductance measurements of a single molecule junction in a statistical study.
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Cites
Generalized Gradient Approximation Made Simple
Perdew, J. P., Burke, K., & Ernzerhof, M. (1996) · Physical Review Letters · doi:10.1103/physrevlett.77.3865 · Cited by 215,824
Cited by
Chen, F., Li, X., Hihath, J., Huang, Z., & Tao, N. (2006) · Journal of the American Chemical Society · doi:10.1021/ja065864k · Cited by 803
Effects of chemical bonding on heat transport across interfaces
Losego, M. D., Grady, M. E., Sottos, N. R., Cahill, D. G., & Braun, P. V. (2012) · Nature Materials · doi:10.1038/nmat3303 · Cited by 701
Molecular junctions based on aromatic coupling
Wu, S., González, M. T., Huber, R., Grunder, S., Mayor, M., Schönenberger, C., & Calame, M. (2008) · Nature Nanotechnology · doi:10.1038/nnano.2008.237 · Cited by 389
Metzger, R. M. (2015) · Chemical Reviews · doi:10.1021/cr500459d · Cited by 380
Probing the conductance superposition law in single-molecule circuits with parallel paths
Vazquez, H., Skouta, R., Schneebeli, S., Kamenetska, M., Breslow, R., Venkataraman, L., & Hybertsen, M. S. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.147 · Cited by 373
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Metadata
- Authors
- Venkataraman, L., Klare, J. E., Tam, I. W., Nuckolls, C., Hybertsen, M. S., & Steigerwald, M. L.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2006-02-01
- Volume
- 6
- Issue
- 3
- Pages
- 458-462
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2157674267
- Cited by
- 851
- References
- 1
- FWCI
- 55.33
- Type
- journal article
- Language
- en
- Open access
- green
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- Venkataraman, L., Klare, J. E., Tam, I. W., Nuckolls, C., Hybertsen, M. S., & Steigerwald, M. L. (2006). Single-Molecule Circuits with Well-Defined Molecular Conductance. Nano Letters. https://doi.org/10.1021/nl052373%2B
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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