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Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation

Amogh Kinikar1*, Thorsten G. Englmann2, Marco Di Giovannantonio1, Nicolò Bassi1, Feifei Xiang1, Samuel Stolz1, Roland Widmer1, Gabriela Borin Barin1, Elia Turco1, Néstor Merino Díez1, Kristjan Eimre1, Andres Ortega-Guerrero1, Xinliang Feng2, Oliver Gröning1, Carlo Antonio Pignedoli1, Roman Fasel1, Pascal Ruffieux1

1 Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf (Switzerland)

2 Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, TU Dresden, Dresden 01062, Germany

* Corresponding authors emails: amogh.kinikar@empa.ch
DOI10.24435/materialscloud:y5-et [version v1]

Publication date: May 16, 2024

How to cite this record

Amogh Kinikar, Thorsten G. Englmann, Marco Di Giovannantonio, Nicolò Bassi, Feifei Xiang, Samuel Stolz, Roland Widmer, Gabriela Borin Barin, Elia Turco, Néstor Merino Díez, Kristjan Eimre, Andres Ortega-Guerrero, Xinliang Feng, Oliver Gröning, Carlo Antonio Pignedoli, Roman Fasel, Pascal Ruffieux, Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation, Materials Cloud Archive 2024.74 (2024), https://doi.org/10.24435/materialscloud:y5-et


In this record we provide the data to support our recent finding on the intercalation of gold chloride underneath atomically precise graphene nanoribbons (GNRs). GNRs have a wide range of electronic properties that depend sensitively on their chemical structure. Several types of GNRs have been synthesized on metal surfaces through selective surface-catalyzed reactions. The resulting GNRs are adsorbed on the metal surface, which may lead to hybridization between the GNR orbitals and those of the substrate. This makes investigation of the intrinsic electronic properties of GNRs more difficult, and also rules out capacitive gating. In the manuscript where the data presented here is discussed, we demonstrate the formation of a dielectric gold chloride adlayer that can intercalate underneath GNRs on the Au(111) surface. The intercalated gold chloride adlayer electronically decouples the GNRs from the metal and leads to a substantial hole doping of the GNRs. Our results introduce an easily accessible tool in the in situ characterization of GNRs grown on Au(111) that allows for exploration of their electronic properties in a heavily hole-doped regime.

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External references

Preprint (Preprint where the data is discussed)


MARVEL DFT STM on surface synthesis electronic properties

Version history:

2024.74 (version v1) [This version] May 16, 2024 DOI10.24435/materialscloud:y5-et