Graphene-Induced Substrate Decoupling and Ideal Doping of a Self-Assembled Iron-phthalocyanine Single Layer

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• 作者：Mattia Scardamaglia ; Simone Lisi ; Silvano Lizzit ; Alessandro Baraldi ; Rosanna Larciprete ; Carlo Mariani ; Maria Grazia Betti
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：February 14, 2013
• 年：2013
• 卷：117
• 期：6
• 页码：3019-3027
• 全文大小：444K
• 年卷期：v.117,no.6(February 14, 2013)
• ISSN：1932-7455

文摘

Iron-phthalocyanine molecules self-assemble on the moir茅 pattern of graphene/Ir(111) as a flat and weakly interacting layer, as determined by core-level photoemission and absorption spectroscopy. The graphene buffer layer decouples the FePc two-dimensional structure from the underlying metal; the electronic structure of the FePc molecular macrocycles is preserved; and the Fe-L_2,3 edges present narrower and slightly modified resonances at the FePc single-layer coverage with respect to a thin film. The FePc layer induces a slight electron doping to the Ir-supported graphene resulting in the Dirac cone position expected for an ideal free-standing-like graphene layer with the standard Fermi velocity.