Coming across a novel copper oxide 2D framework during the oxidation of Cu(111)

Sonia MatencioEsther Barrena and Carmen Ocal*. Phys. Chem. Chem. Phys., 2016,18, 33303-33309DOI: 10.1039/C6CP07134A

Two dimensional copper oxides obtained on Cu(111) by air-enriched argon sputtering plus annealing have been measured at room temperature by means of scanning tunneling microscopy (STM) and atomic force microscopy (AFM) under ultra-high vacuum (UHV) conditions. Depending on the oxygen content different oxide frameworks and diverse stoichiometric metal/oxide interfaces exist. In particular, we report on a novel open honeycomb structure with a large unit cell which is modeled as a two dimensional network made out of Cu3O units. This lattice coexists with other oxide structures richer in oxygen and is suggested to develop towards these denser phases by oxygen incorporation.

Oxides for new-generation electronics

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