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Electronic consequences of chemical doping of 7-Armchair Graphene Nanoribbons

AuthorsCorso, Martina ; Carbonell, Eduard; García-Lekue, Aran; Brandimarte, Pedro; Hieulle, Jeremy; Vilas-Varela, Manuel; Merino-Díez, Nestor; Vasseur, Guillaume; Lobo-Checa, Jorge ; Oteyza, D. G. de ; Kawai, Shigeki; Iraola, Mikel; Barragán, Ana; Abadia, Mikel; Ortega, J. Enrique ; Sánchez-Portal, Daniel ; Peña, Diego; Pascual, José I.
Issue Date2018
CitationInternational Conference on Nanoscience + Technology (2018)
AbstractThe tunable electronic structure of Graphene Nanoribbons (GNRs) with different edge types has provoked great interest due to potential applications in electronic devices as molecular diodes or transistors. Thanks to the on-surface synthesis of chemically customized molecular precursors, nanoribbons with atomically defined structure can be grown. This high precision in their bottom-up growth allows to tune their electronic structure via width control or chemical doping. Here we use two different strategies to chemically modify 7-armchair GNRs (7-AGNRs) to clarify how the chemical modifications on the nanoribbons’ structure affect their electronic properties. By means of Scanning Tunneling Spectroscopy we tackle with atomic precision this issue on 7-AGNRs with substitutional nitrile functional groups at the ribbons’ edges and on 7-AGNRs with substitutional boron atoms within the ribbons’ backbone. We find that in the first case the CN groups lead to an efficient n-like doping of the ribbon, while in the second case B atoms induce the formation of a new acceptor band and bandgap renormalization.
DescriptionResumen del trabajo presentado a la International Conference on Nanoscience + Technology (ICN+T), celebrada en Brno (Czech Republic) del 22 al 27 de julio de 2018.
Appears in Collections:(CFM) Comunicaciones congresos
(ICMA) Comunicaciones congresos
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