Charge transport characteristics of Diarylethene photoswitching single-molecule junctions

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2012
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Wolf, Jannic
Erbe, Artur
Huhn, Thomas
Groth, Ulrich
Steiner, Ulrich
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Nano Letters. 2012, 12(7), pp. 3736-3742. ISSN 1530-6984. eISSN 1530-6992. Available under: doi: 10.1021/nl3015523
Zusammenfassung

We report on the experimental analysis of the charge transport through single-molecule junctions of the open and closed isomers of photoswitching molecules. Sulfur-free diarylethene molecules are developed and studied via electrical and optical measurements as well as density functional theory calculations. The single-molecule conductance and the current−voltage characteristics are measured in a mechanically controlled break-junction system at low temperatures. Comparing the results with the single-level transport model, we find an unexpected behavior of the current-dominating molecular orbital upon isomerization. We show that both the side chains and end groups of the molecules are crucial to understand the charge transport mechanism of photoswitching molecular junctions.

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540 Chemie
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Photochromic, diarylethene, single molecule, charge transport, single-level model, low temperature
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ISO 690KIM, Youngsang, Thomas J. HELLMUTH, Dmytro SYSOIEV, Fabian PAULY, Torsten PIETSCH, Jannic WOLF, Artur ERBE, Thomas HUHN, Ulrich GROTH, Ulrich STEINER, Elke SCHEER, 2012. Charge transport characteristics of Diarylethene photoswitching single-molecule junctions. In: Nano Letters. 2012, 12(7), pp. 3736-3742. ISSN 1530-6984. eISSN 1530-6992. Available under: doi: 10.1021/nl3015523
BibTex
@article{Kim2012-07-11Charg-20131,
  year={2012},
  doi={10.1021/nl3015523},
  title={Charge transport characteristics of Diarylethene photoswitching single-molecule junctions},
  number={7},
  volume={12},
  issn={1530-6984},
  journal={Nano Letters},
  pages={3736--3742},
  author={Kim, Youngsang and Hellmuth, Thomas J. and Sysoiev, Dmytro and Pauly, Fabian and Pietsch, Torsten and Wolf, Jannic and Erbe, Artur and Huhn, Thomas and Groth, Ulrich and Steiner, Ulrich and Scheer, Elke}
}
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