Robust graphene-based molecular devices.
- El Abbassi M Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Dübendorf, Switzerland.
- Sangtarash S Department of Physics, Lancaster University, Lancaster, UK.
- Liu X Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland.
- Perrin ML Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Dübendorf, Switzerland.
- Braun O Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Dübendorf, Switzerland.
- Lambert C Department of Physics, Lancaster University, Lancaster, UK.
- van der Zant HSJ Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.
- Yitzchaik S Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel.
- Decurtins S Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland.
- Liu SX Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland. liu@dcb.unibe.ch.
- Sadeghi H Department of Physics, Lancaster University, Lancaster, UK. h.sadeghi@lancaster.ac.uk.
- Calame M Empa, Swiss Federal Laboratories for Materials Science and Technology, Transport at Nanoscale Interfaces Laboratory, Dübendorf, Switzerland. michel.calame@empa.ch.
- 2019-09-19
Published in:
- Nature nanotechnology. - 2019
Electrical and Electronic Engineering
General Materials Science
Atomic and Molecular Physics, and Optics
Bioengineering
Condensed Matter Physics
Biomedical Engineering
English
One of the main challenges to upscale the fabrication of molecular devices is to achieve a mechanically stable device with reproducible and controllable electronic features that operates at room temperature1,2. This is crucial because structural and electronic fluctuations can lead to significant changes in the transport characteristics at the electrode-molecule interface3,4. In this study, we report on the realization of a mechanically and electronically robust graphene-based molecular junction. Robustness was achieved by separating the requirements for mechanical and electronic stability at the molecular level. Mechanical stability was obtained by anchoring molecules directly to the substrate, rather than to graphene electrodes, using a silanization reaction. Electronic stability was achieved by adjusting the π-π orbitals overlap of the conjugated head groups between neighbouring molecules. The molecular devices exhibited stable current-voltage (I-V) characteristics up to bias voltages of 2.0 V with reproducible transport features in the temperature range from 20 to 300 K.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1038/s41565-019-0533-8
- PMID 31527843
- Persistent URL
- https://folia.unifr.ch/global/documents/293109
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