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Growth and sacrificial oxidation of transition metal nanolayers

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Abstract

Growth and oxidation of Au, Pt, Pd, Rh, Cu, Ru, Ni and Co layers of 0.3-4.3 nm thickness on Mo have been investigated with ARPES and AFM. Co and Ni layers oxidize while the Mo remains metallic. For nobler metals, the on top O and oxidation state of subsurface Mo increase, suggesting sacrificial e(-) donation by Mo. Au and Cu, in spite of their significantly lower surface free energy, grow in islands on Mo and actually promote Mo oxidation. Applications of the sacrificial oxidation in nanometer thin layers exist in a range of nanoscopic devices, such as nano-electronics and protection of e.g. multilayer X-ray optics for astronomy, medicine and lithography. (C) 2009 Elsevier B.V. All rights reserved.

Year of Publication
2009
Journal
Surface Science
Volume
603
Number
7
Number of Pages
1041-1045
Date Published
Apr
Type of Article
Article
ISBN Number
0039-6028
Accession Number
ISI:000265310000013
URL
PId
2d3f6432aef5946bff53d17b3ee31c47
Alternate Journal
Surf. Sci.
Journal Article
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