Mechanism of the Yb2+ → Yb3+ valence transition in ytterbium nanofilms upon chemisorption of CO and O2 molecules on their surface

The dependences of the work function of ytterbium nanofilms with a thickness ranging from 1 to 32 monolayers on the amount of CO or O 2 molecules chemisorbed on their surface have been investigated experimentally. It has been found that these dependences have a pronounced nonmonotonic character. The...

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Bibliographic Details
Published in:Physics of the solid state 2016, Vol.58 (10), p.2130-2134
Main Authors: Mittsev, M. A., Kuz’min, M. V., Loginov, M. V.
Format: Article
Language:English
Subjects:
Carbon monoxide
Chemisorption
Physics
Physics and Astronomy
Solid State Physics
Surface chemistry
Surface Physics and Thin Films
Thickness
Work functions
Ytterbium
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Summary:The dependences of the work function of ytterbium nanofilms with a thickness ranging from 1 to 32 monolayers on the amount of CO or O 2 molecules chemisorbed on their surface have been investigated experimentally. It has been found that these dependences have a pronounced nonmonotonic character. The mechanism of the Yb 2+ → Yb 3+ valence transition, which occurs upon the chemisorption of CO or O 2 molecules on the surface of ytterbium nanofilms, has been developed using the results of this study together with the previously obtained data.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783416100231