Articles producció científica> Química Analítica i Química Orgànica

Electronic decoupling of polyacenes from the underlying metal substrate by sp 3 carbon atoms

  • Dades identificatives

    Identificador: imarina:8680182
    Autors:
    Mohammed MSGColazzo LRobles RDorel REchavarren AMLorente Nde Oteyza DG
    Resum:
    © 2020, The Author(s). On-surface synthesis is becoming an increasingly popular approach to obtain new organic materials. In this context, metallic surfaces are the most commonly used substrates. However, their hybridization with the adsorbates often hinder a proper characterization of the molecule’s intrinsic electronic and magnetic properties. Here we report a route to electronically decouple molecules from their supporting substrates. In particular, we have used a Ag(001) substrate and hydrogenated heptacene molecules, in which the longest conjugated segment determining its frontier molecular orbitals amounts to five consecutive rings. The non-planarity that sp3 atoms impose on the carbon backbone results in electronically decoupled molecules, as demonstrated by scanning tunneling spectroscopy measurements. The charging resonances of the latter imply the presence of double tunneling barriers. We further explain the existing relation between the charging resonance energy and their contrast, as well as with the presence or absence of additional Kondo resonances.
  • Altres:

    Autor segons l'article: Mohammed MSG; Colazzo L; Robles R; Dorel R; Echavarren AM; Lorente N; de Oteyza DG
    Departament: Química Analítica i Química Orgànica
    Autor/s de la URV: ECHAVARREN PABLOS, ANTONIO
    Paraules clau: On-surface synthesis Heptacene Graphene nanoribbons Charge-transfer Barrier Acenes
    Resum: © 2020, The Author(s). On-surface synthesis is becoming an increasingly popular approach to obtain new organic materials. In this context, metallic surfaces are the most commonly used substrates. However, their hybridization with the adsorbates often hinder a proper characterization of the molecule’s intrinsic electronic and magnetic properties. Here we report a route to electronically decouple molecules from their supporting substrates. In particular, we have used a Ag(001) substrate and hydrogenated heptacene molecules, in which the longest conjugated segment determining its frontier molecular orbitals amounts to five consecutive rings. The non-planarity that sp3 atoms impose on the carbon backbone results in electronically decoupled molecules, as demonstrated by scanning tunneling spectroscopy measurements. The charging resonances of the latter imply the presence of double tunneling barriers. We further explain the existing relation between the charging resonance energy and their contrast, as well as with the presence or absence of additional Kondo resonances.
    Àrees temàtiques: Physics, multidisciplinary Physics and astronomy (miscellaneous) Physics and astronomy (all) General physics and astronomy Ciencias sociales
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: antoniomaria.echavarren@urv.cat
    Identificador de l'autor: 0000-0002-6418-7930
    Data d'alta del registre: 2023-05-13
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.nature.com/articles/s42005-020-00425-y
    Referència a l'article segons font original: Communications Physics. 3 (1):
    Referència de l'ítem segons les normes APA: Mohammed MSG; Colazzo L; Robles R; Dorel R; Echavarren AM; Lorente N; de Oteyza DG (2020). Electronic decoupling of polyacenes from the underlying metal substrate by sp 3 carbon atoms. Communications Physics, 3(1), -. DOI: 10.1038/s42005-020-00425-y
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.1038/s42005-020-00425-y
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2020
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Physics and Astronomy (Miscellaneous),Physics, Multidisciplinary
    On-surface synthesis
    Heptacene
    Graphene nanoribbons
    Charge-transfer
    Barrier
    Acenes
    Physics, multidisciplinary
    Physics and astronomy (miscellaneous)
    Physics and astronomy (all)
    General physics and astronomy
    Ciencias sociales
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