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Regular version of the site

Article

Adsorption of O-2 on Ag(111): Evidence of Local Oxide Formation

Physical Review Letters. 2016. Vol. 117. P. 056101-1-056101-5.
B.V. Andryushechkin, Shevlyuga V., T.V. Pavlova, G.M. Zhidomirov, K.N. Eltsov.

The atomic structure of the disordered phase formed by oxygen on Ag(111) at low coverage

is determined by a combination of low-temperature scanning tunneling microscopy and density

functional theory. We demonstrate that the previous assignment of the dark objects in STM to

chemisorbed oxygen atoms is incorrect and incompatible with trefoil-like structures observed in

atomic-resolution images in current work. In our model, each object is an oxide-like ring formed by

six oxygen atoms around the vacancy in Ag(111). The saturation coverage of the disordered phase

was found to be  0.36 ML, being six time larger than in the previous models.