Robust graphene-based molecular devices

Maria El Abbassi, Sara Sangtarash, Xunshan Liu, Mickael Lucien Perrin, Oliver Braun, Colin Lambert, Herre Sjoerd Jan van der Zant, Shlomo Yitzchaik, Silvio Decurtins, Shi Xia Liu, Hatef Sadeghi, Michel Calame*

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

48 Scopus citations

Abstract

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.

Original languageAmerican English
Pages (from-to)957-961
Number of pages5
JournalNature Nanotechnology
Volume14
Issue number10
DOIs
StatePublished - 1 Oct 2019

Bibliographical note

Publisher Copyright:
© 2019, The Author(s), under exclusive licence to Springer Nature Limited.

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