Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909185523843072 |
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| author | Kinikar, Amogh Englmann, Thorsten G. Di Giovannantonio, Marco Bassi, Nicolò Xiang, Feifei Stolz, Samuel Widmer, Roland Barin, Gabriela Borin Turco, Elia Díez, Néstor Merino Eimre, Kristjan Guerrero, Andres Ortega Feng, Xinliang Gröning, Oliver Pignedoli, Carlo A. Fasel, Roman Ruffieux, Pascal |
| author_facet | Kinikar, Amogh Englmann, Thorsten G. Di Giovannantonio, Marco Bassi, Nicolò Xiang, Feifei Stolz, Samuel Widmer, Roland Barin, Gabriela Borin Turco, Elia Díez, Néstor Merino Eimre, Kristjan Guerrero, Andres Ortega Feng, Xinliang Gröning, Oliver Pignedoli, Carlo A. Fasel, Roman Ruffieux, Pascal |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_19389 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation Kinikar, Amogh Englmann, Thorsten G. Di Giovannantonio, Marco Bassi, Nicolò Xiang, Feifei Stolz, Samuel Widmer, Roland Barin, Gabriela Borin Turco, Elia Díez, Néstor Merino Eimre, Kristjan Guerrero, Andres Ortega Feng, Xinliang Gröning, Oliver Pignedoli, Carlo A. Fasel, Roman Ruffieux, Pascal Materials Science Mesoscale and Nanoscale Physics 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. |
| title | Electronic decoupling and hole-doping of graphene nanoribbons on metal substrates by chloride intercalation |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.19389 |