The interaction strength of FePc molecules adsorbed on graphene-Co, obtained by intercalation of Co layer(s) under graphene (Gr) grown on Ir(111), has been investigated by core level photoemission and X-ray absorption spectroscopy. Upon intercalation of a single layer of Co beneath Gr, the Co atoms are pseudomorphic with the Ir(111) lattice, inducing a rippled Gr layer with valley and hill regions. FePc molecules, adsorbed on Gr/1 ML Co, are trapped in the valley regions and the Fe metallic centers strongly interact with the Gr/Co system. The intercalation of further Co layers leads to a relaxation of the Co lattice up to the formation of a commensurate (1 × 1) Gr/Co system. The Fe centers of the molecules adsorbed on the flat commensurate Gr/Co are found to be less interacting. We have determined that, even though the organic macrocycles of the FePc molecules, flat lying on the Gr/Co system, are completely decoupled by the presence of the Gr intralayer, the Fe–Co interaction is mediated by the graphene spacer and dependent on Gr corrugation.
Graphene-mediated interaction between FePc and intercalated cobalt layers / Avvisati, Giulia; Mondelli, Pierluigi; Gargiani, Pierluigi; Betti, Maria Grazia. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - ELETTRONICO. - (2017).
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|Titolo:||Graphene-mediated interaction between FePc and intercalated cobalt layers|
|Data di pubblicazione:||2017|
|Citazione:||Graphene-mediated interaction between FePc and intercalated cobalt layers / Avvisati, Giulia; Mondelli, Pierluigi; Gargiani, Pierluigi; Betti, Maria Grazia. - In: APPLIED SURFACE SCIENCE. - ISSN 0169-4332. - ELETTRONICO. - (2017).|
|Appartiene alla tipologia:||01a Articolo in rivista|