AI Article Synopsis
- Atomically precise graphene nanoribbons (GNRs) exhibit varied electronic properties based on their chemical structure, making them complex to study.
- Various GNRs have been created on metal surfaces, but their interaction with the substrate complicates the understanding of their intrinsic electronic properties.
- The introduction of a dielectric gold chloride layer beneath the GNRs helps to electronically separate them from the metal, allowing for improved investigation of their electronic characteristics, particularly in a hole-doped state.
Article Abstract
Atomically precise graphene nanoribbons (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. Here, 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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| http://dx.doi.org/10.1021/acsnano.4c00484 | DOI Listing |
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