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Controlling single-molecule junction conductance by molecular interactions
Kyoto University, Japan.
Kyoto University, Japan.
Kyoto University, Japan.
Kyoto University, Japan.
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2015 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, 11796Article in journal (Refereed) Published
Abstract [en]

For the rational design of single-molecular electronic devices, it is essential to understand environmental effects on the electronic properties of a working molecule. Here we investigate the impact of molecular interactions on the single-molecule conductance by accurately positioning individual molecules on the electrode. To achieve reproducible and precise conductivity measurements, we utilize relatively weak pi-bonding between a phenoxy molecule and a STM-tip to form and cleave one contact to the molecule. The anchoring to the other electrode is kept stable using a chalcogen atom with strong bonding to a Cu(110) substrate. These non-destructive measurements permit us to investigate the variation in single-molecule conductance under different but controlled environmental conditions. Combined with density functional theory calculations, we clarify the role of the electrostatic field in the environmental effect that influences the molecular level alignment.

Place, publisher, year, edition, pages
2015. Vol. 5, 11796
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Physics, Electrotechnology
Identifiers
URN: urn:nbn:se:lnu:diva-45786DOI: 10.1038/srep11796ISI: 000357263200003PubMedID: 26135251OAI: oai:DiVA.org:lnu-45786DiVA: diva2:847423
Available from: 2015-08-20 Created: 2015-08-19 Last updated: 2016-05-25Bibliographically approved

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