Journal
NATURE NANOTECHNOLOGY
Volume 14, Issue 10, Pages 957-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41565-019-0533-8
Keywords
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Funding
- European Commission FP7-ITN Molecular-scale Electronics: Concepts, Contacts and Stability (MOLESCO) [606728]
- FET open project QuIET [767187]
- UK Engineering and Physical Sciences Research Council [EP/M014452/1, EP/N017188/1]
- European Research Council
- UK Research and Innovation for Future Leaders Fellowship [MR/S015329/1]
- Leverhulme Trust [ECF-2017-186, ECF-2018-375]
- EMPAPOSTDOCS-II programme - European Union [754364]
- Marie Curie Actions (MSCA) [754364] Funding Source: Marie Curie Actions (MSCA)
- UKRI [MR/S015329/1, MR/S015329/2] Funding Source: UKRI
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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 temperature(1,2). This is crucial because structural and electronic fluctuations can lead to significant changes in the transport characteristics at the electrode-molecule interface(3,4). 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 pi-pi 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.
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