Effect of atomic layer deposition coatings on the surface structure of anodic aluminum oxide membranes

Article Abstract:

A detailed structural study of anodic aluminum oxide (AAO) membranes before and after atomic layer deposition (ALD) coating using ultraviolet (UV) Raman spectroscopy and Fourier transform-infrared spectroscopy (FT-IR) is presented. UV Raman reveals the presence of aluminum oxalate in bulk AAO, both before and after ALD coating with Al2O3, because of acid anion incorporation during the anodization process used to produce AAO membranes.

Aluminum Oxide, Electric properties, Fourier transform infrared spectroscopy, Electrodeposition

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Protonation of an H(sub 2)O dimer by a Zeolite Bronsted acid site

Article Abstract:

Interaction of an H(sub 2)O dimer with Bronsted acid site in a zeolite as represented by a Si(sub 4)AlO(sub 4)H(sub 13) clusters using the B3LYP density functional method is studied. The results reveal that like protonated water monomer complex, the protonated water dimer complex is a transition state for proton exchange between adjacent framework oxygen atoms in the cluster model of the zeolite.

Water chemistry, Dimer acids

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(super 133)Cesium HYSCORE investigation of the di-tert-butyl nitroxide-Cs(super +) adsorption complex in CsNaY zeolite

Article Abstract:

(super 133)Cs hyperfine sublevel correlation (HYSCORE) spectroscopy of di-tert-butyl nitroxide (DTBN) adsorbed in cesium-exchanged Y zeolites shows evidence for the direct coordination of the nitroxide molecules to the metal cation and gives an insight in to the geometry of the formed adsorption complexes. Two different complex structures are reported.

Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Cesium

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