Termination and water adsorption at the alpha-Al2O3 (012)-aqueous solution interface

Langmuir : the ACS Journal of Surfaces and Colloids
J CatalanoPaul Fenter

Abstract

Understanding the interaction of water with metal oxide surfaces is important to a diverse array of fields and is essential to the interpretation of surface charging and ion adsorption behavior. High-resolution specular X-ray reflectivity was used to determine the termination of and water adsorption on the alpha-Al2O3 (012)-aqueous solution interface. Interference features in the reflectivity data were used to identify the likely termination, consisting of a full Al2O3 layer plus an additional oxygen layer that completes the coordination shell of the upper aluminum site. This was further investigated through a model-independent inversion of the data using an error correction algorithm, which also revealed that there are two sites of adsorbed water above the surface. Characteristics of these two water sites were quantified through a model-dependent structural refinement, which also revealed additional layering in the interfacial water that gradually decays toward disordered bulk water away from the surface. Although the termination observed in this study differs from that assumed in past studies of surface charging, the density of key surface functional groups is unchanged, and thus, predictions of surface charging behavior are ...Continue Reading

References

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Citations

Mar 8, 2011·Physical Chemistry Chemical Physics : PCCP·Asma TougertiXavier Carrier
Apr 26, 2013·The Journal of Chemical Physics·Matthew Watkins, Bernhard Reischl
Jun 25, 2009·The Journal of Chemical Physics·Li-Min LiuAngelos Michaelides
Feb 15, 2008·Journal of Colloid and Interface Science·Monika StachowiczWillem H van Riemsdijk
Sep 11, 2007·Journal of Colloid and Interface Science·Rasoul RahnemaieWillem H van Riemsdijk
Feb 20, 2007·Journal of Colloid and Interface Science·Tjisse HiemstraWillem H van Riemsdijk
Sep 2, 2014·Scientific Reports·Pierre-Adrien ManteChi-Kuang Sun
Apr 7, 2009·Chemistry : a European Journal·William H CaseyLeone Spiccia
Jan 24, 2007·Biotechnology and Bioengineering·Eric M KraulandAngela M Belcher
Jun 24, 2010·Angewandte Chemie·Wei ZhangDangsheng Su
Aug 12, 2015·The Journal of Physical Chemistry Letters·Takeyoshi GotoYukihiro Ozaki
Oct 13, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Tjisse Hiemstra
Mar 15, 2013·The Journal of Physical Chemistry. B·Anh PhanAlberto Striolo
Dec 19, 2009·Nature Materials·C André OhlinWilliam H Casey
Sep 13, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Ryugo TeroTsuneo Urisu
Mar 3, 2011·Journal of the American Chemical Society·Jaeho SungY Ron Shen
Sep 19, 2007·Environmental Science & Technology·Monika StachowiczWillem H van Riemsdijk
Feb 24, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Rasoul RahnemaieWillem H van Riemsdijk

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