Coadsorption of lithium and oxygen on W(1 1 2): nanosized facets versus single crystals

Y Suchorski; M S Hupalo

doi:10.1016/j.ultramic.2010.12.037

Coadsorption of lithium and oxygen on W(1 1 2): nanosized facets versus single crystals

Ultramicroscopy. 2011 May;111(6):381-5. doi: 10.1016/j.ultramic.2010.12.037. Epub 2011 Feb 2.

Authors

Y Suchorski¹, M S Hupalo

Affiliation

¹ Institute of Materials Chemistry, Vienna University of Technology, Getreiedemarkt 9, A-1060 Vienna, Austria. yuri.suchorski@imc.tuwien.ac.at

PMID: 21664538
DOI: 10.1016/j.ultramic.2010.12.037

Abstract

Coadsorption of lithium and oxygen on a nanosized W-tip is studied using field ion appearance energy spectroscopy (FIAES). Binding energies of coadsorbed Li-adatoms are derived locally for chosen atomic sites on (1 1 2) facets for different oxygen and Li-coverages. Independently, the binding energies of Li-adatoms in coadsorbed Li/oxygen layers are determined for macroscopic W(1 1 2) single crystal samples from the adsorption isobars in adsorption-desorption equilibrium experiments and compared with the local nm-scale measurements. The comparison reveals a very good agreement of results obtained by two different methods on differing length scales.