Platinum contacts for 9-atom-wide armchair graphene nanoribbons

Chunwei Hsu, Michael Rohde, Gabriela Borin Barin, Guido Gandus, Daniele Passerone, Mathieu Luisier, Pascal Ruffieux, Roman Fasel, Herre S.J. van der Zant*, Maria El Abbassi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
3 Downloads (Pure)


Creating a good contact between electrodes and graphene nanoribbons (GNRs) has been a long-standing challenge in searching for the next GNR-based nanoelectronics. This quest requires the controlled fabrication of sub-20 nm metallic gaps, a clean GNR transfer minimizing damage and organic contamination during the device fabrication, as well as work function matching to minimize the contact resistance. Here, we transfer 9-atom-wide armchair-edged GNRs (9-AGNRs) grown on Au(111)/mica substrates to pre-patterned platinum electrodes, yielding polymer-free 9-AGNR field-effect transistor devices. Our devices have a resistance in the range of 106-108 Ω in the low-bias regime, which is 2-4 orders of magnitude lower than previous reports. Density functional theory calculations combined with the non-equilibrium Green's function method explain the observed p-type electrical characteristics and further demonstrate that platinum gives strong coupling and higher transmission in comparison to other materials, such as graphene.

Original languageEnglish
Article number173104
Number of pages7
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 2023


Dive into the research topics of 'Platinum contacts for 9-atom-wide armchair graphene nanoribbons'. Together they form a unique fingerprint.

Cite this