The Interaction of Water with Solid Surfaces: Fundamental Aspects Revisited

Reference LPI-ARTICLE-1999-017View record in Web of Science Record created on 2006-02-21, modified on 2017-05-12

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Metal Oxide Surfaces and Their Interactions with Aqueous Solutions and Microbial Organisms.

Interaction of nanostructured metal overlayers with oxide surfaces

The physical and chemical properties of the hydrated α-Al2O3 (0001) surface are important for understanding the reactivity of natural and synthetic aluminum-containing oxides. The structure of this surface was determined in the presence of water vapor at 300 kelvin by crystal truncation rod diffraction at a third-generation synchrotron x-ray source. The fully hydrated surface is oxygen terminated, with a 53% contracted double Al layer directly below. The structure is an intermediate between α-Al2O3 and γ-Al(OH)3, a fully hydroxylated form of alumina. A semiordered oxygen layer about 2.3 angstroms above the terminal oxygen layer is interpreted as adsorbed water. The clean α-Al2O3 (0001) surface, in contrast, is Al terminated and significantly relaxed relative to the bulk structure. These differences explain the different reactivities of the clean and hydroxylated surfaces.

https://science.sciencemag.org/content/sci/288/5468/1029.full.pdf

Structure of the Hydrated α-Al2O3 (0001) Surface

Mineral–water interfacial structures revealed by synchrotron X-ray scattering

The adsorption of H2O on a single-crystal α-Al2O3(0001) surface was examined using laser-induced thermal desorption (LITD) and temperature-programmed desorption (TPD) techniques. α-Al2O3(0001) mode...

M. A. Cameron

Papers

Adsorption of H2O on a Single-Crystal α-Al2O3(0001) Surface

Desorption of H2O from a hydroxylated single-crystal α-Al2O3(0001) surface