I.Carlomagno, J.Drnec, A.M.Scaparro, S.Cicia, S.Mobilio, R.Felici, C.Meneghini
Chemical Physics Letters, 697(2018),7-11, DOI:10.1016/j.cplett.2018.02.054
Publication year: 2018

Graphene can be used to avoid the oxidation of metallic films. This work explores the effectiveness of such stabilizing effect on Cobalt (Co) films intercalated between Graphene and Ir(1 1 1). After intercalation at 300 °C, two Co films are exposed to ambient pressure and investigated using Co-K edge X-ray Absorption Near Edge Spectroscopy. The formation of a disordered oxide phase is observed, and associated to the presence of some non-intercalated Co. Further annealing at 500 °C causes the oxide reduction to metallic Co which further intercalates below the Graphene. Once the intercalation is completed, Graphene prevents the Co from oxidation under ambient pressure conditions.

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