Role of solvents in the electronic transport properties of single-molecule junctions

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2016
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Beilstein Journal of Nanotechnology. 2016, 7, pp. 1055-1067. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.7.99
Zusammenfassung

We report on an experimental study of the charge transport through tunnel gaps formed by adjustable gold electrodes immersed into different solvents that are commonly used in the field of molecular electronics (ethanol, toluene, mesitylene, 1,2,4-trichlorobenzene, isopropanol, toluene/tetrahydrofuran mixtures) for the study of single-molecule contacts of functional molecules. We present measurements of the conductance as a function of gap width, conductance histograms as well as current–voltage characteristics of narrow gaps and discuss them in terms of the Simmons model, which is the standard model for describing transport via tunnel barriers, and the resonant single-level model, often applied to single-molecule junctions. One of our conclusions is that stable junctions may form from solvents as well and that both conductance–distance traces and current–voltage characteristics have to be studied to distinguish between contacts of solvent molecules and of molecules under study.

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530 Physik
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electrochemical environment; mechanically controllable break junction; molecular electronics; polar solvent; single-molecule junctions
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ISO 690LUKA-GUTH, Katharina, Sebastian HAMBSCH, Andreas BLOCH, Philipp EHRENREICH, Bernd M. BRIECHLE, Filip KILIBARDA, Torsten SENDLER, Dmytro SYSOIEV, Thomas HUHN, Artur ERBE, Elke SCHEER, 2016. Role of solvents in the electronic transport properties of single-molecule junctions. In: Beilstein Journal of Nanotechnology. 2016, 7, pp. 1055-1067. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.7.99
BibTex
@article{LukaGuth2016solve-34913,
  year={2016},
  doi={10.3762/bjnano.7.99},
  title={Role of solvents in the electronic transport properties of single-molecule junctions},
  volume={7},
  journal={Beilstein Journal of Nanotechnology},
  pages={1055--1067},
  author={Luka-Guth, Katharina and Hambsch, Sebastian and Bloch, Andreas and Ehrenreich, Philipp and Briechle, Bernd M. and Kilibarda, Filip and Sendler, Torsten and Sysoiev, Dmytro and Huhn, Thomas and Erbe, Artur and Scheer, Elke},
  note={This work was supported by the Deutsche Forschungsgemeinschaft through SFB767 and by the Research Network “Functional Nanostructures” of the Baden-Württemberg Foundation.}
}
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This work was supported by the Deutsche Forschungsgemeinschaft through SFB767 and by the Research Network “Functional Nanostructures” of the Baden-Württemberg Foundation.
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