Hydroxylated α-Al2O3 (0001) surfaces and metal/α-Al2O3 (0001) interfaces

Fu, Q.; Wagner, T.; Rühle, M.

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Hydroxylated α-Al₂O₃ (0001) surfaces and metal/α-Al₂O₃ (0001) interfaces

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Wagner, T.
Miscellaneous, Max Planck Institute for Solid State Research, Max Planck Society;

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Fu, Q., Wagner, T., & Rühle, M. (2006). Hydroxylated α-Al₂O₃ (0001) surfaces and metal/α-Al₂O₃ (0001) interfaces. Surface Science, 600(21), 4870-4877.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FC60-A

Abstract

X-ray photoelectron spectroscopy was applied to study the hydroxylation
of alpha-Al2O3 (0001) surfaces and the stability of surface OH groups.
The evolution of interfacial chemistry of the alpha-Al2O3 (0001)
surfaces and metal/alpha-Al2O3 (0001) interfaces are well illustrate
via modifications of the surface Ols spectra. Clean hydroxylated
surfaces are obtained through water- and oxygen plasma treatment at
room temperature. The surface OH groups of the hydroxylated surface are
very sensitive to electron beam illumination, Ar+ sputtering, UHV
heating, and adsorption of reactive metals. The transformation of a
hydroxylated surface to an Al-terminated surface occurs by high
temperature annealing or Al deposition. (c) 2006 Elsevier B.V. All
rights reserved.