Sorption of Uranyl Cations on a Rutile (001) Single Crystal Monitored by Surface Second-Harmonic Generation

The rotational anisotropy of second-harmonic generation at the surface of a (001) single-crystal rutile is obtained in the presence of uranyl cations sorbed at the surface from acidic solutions at various concentrations. Surface second-harmonic generation appears to be sensitive to the presence of u...

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Bibliographic Details
Published in:Langmuir 2006-01, Vol.22 (1), p.140-147
Main Authors: Dossot, Manuel, Cremel, Sébastien, Vandenborre, Johan, Grausem, Jérôme, Humbert, Bernard, Drot, Romuald, Simoni, Eric
Format: Article
Language:English
Subjects:
Chemical Physics
Chemistry
Exact sciences and technology
General and physical chemistry
Physics
Surface physical chemistry
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Summary:The rotational anisotropy of second-harmonic generation at the surface of a (001) single-crystal rutile is obtained in the presence of uranyl cations sorbed at the surface from acidic solutions at various concentrations. Surface second-harmonic generation appears to be sensitive to the presence of uranyl cations on the rutile samples. Evolution of the anisotropy pattern with initial uranyl concentration is analyzed through a phenomenological model. The elements obtained for the nonlinear susceptibility tensor for each sample significantly constrain the geometry of the possible sorption complexes between uranyl cations and rutile and lead to the proposition of two sorption sites involving different oxygen atoms of the rutile surface.
ISSN:0743-7463
1520-5827
DOI:10.1021/la0519913