FePc Adsorption on the Moire Superstructure of Graphene Intercalated with a Cobalt Layer

Giulia Avvisati, Simone Lisi, Pierluigi Gargiani, Ada Della Pia, Oreste De Luca, Daniela Pacile, Claudia Cardoso, Daniele Varsano, Deborah Prezzi, Andrea Ferretti, Maria Grazia Betti*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

The moire superstructure of graphene grown on metals can drive the assembly of molecular architectures, such as iron phthalocyanine (FePc) molecules, allowing for the production of artificial molecular configurations. A detailed analysis of the Gr/Co interaction upon intercalation (including a modeling of the resulting moire pattern) is performed here by density functional theory, which provides an accurate description of the template as a function of the corrugation parameters. The theoretical results are a preliminary step to describe the interaction process of the FePc molecules adsorption on the Gr/Co system. Core level photoemission and absorption spectroscopies have been employed to control the preferential adsorption regions of the FePc on the graphene moire superstructure and the interaction of the central Fe ion with the underlying Co. Our results show that, upon molecular adsorption, the distance of C atoms from the Co template mainly drives the strength of the molecules-substrate interaction, thereby allowing for locally different electronic properties within the corrugated interface.

Original languageEnglish
Pages (from-to)1639-1647
Number of pages9
JournalJournal of Physical Chemistry C
Volume121
Issue number3
DOIs
Publication statusPublished - 26-Jan-2017

Keywords

  • PHTHALOCYANINE MOLECULES
  • METAL PHTHALOCYANINES
  • IRON-PHTHALOCYANINE
  • EPITAXIAL GRAPHENE
  • ORDERED FEPC
  • AU(110)
  • COMPLEXES
  • ATOMS
  • CO

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