Publications by authors named "Christiane Poinsignon"
A large electric field at the surface of a ferromagnetic metal is expected to appreciably change its electron density. In particular, the metal's intrinsic magnetic properties, which are commonly regarded as fixed material constants, will be affected. This requires, however, that the surface has a strong influence on the material's properties, as is the case with ultrathin films.
View Article and Find Full Text PDFRelationships between structural parameters of MnO2 and their surface properties at the solid-gas interface were investigated. The studied series ranged from ramsdellite to pyrolusite and encompassed disordered gamma-MnO2 samples. The structural model used takes into account structural defects: Pr (rate of pyrolusite intergrowth in the ramsdellite network) and Tw (rate of microtwinning).
View Article and Find Full Text PDFRelationships between lattice parameters of manganese dioxides and their surface properties at the solid-aqueous solution interface were investigated. The studied series ranged from ramsdellite to pyrolusite and encompassed disordered MD samples. The structural model used takes into account structural defects: Pr (rate of pyrolusite intergrowth) and Tw (rate of microtwinning).
View Article and Find Full Text PDFArticle Synopsis
- The paper compares two models for analyzing potentiometric titration and CEC data: the Baeyens and Bradbury model and the MUSIC model created by Hiemstra and Van Riemsdijk.
- The MUSIC model, which incorporates both morphological and structural information, provides a better fit to the data by utilizing at least 27 edge reaction sites compared to just 3 in the Baeyens and Bradbury model.
- Although the MUSIC model offers more complexity, it requires fewer adjustable parameters due to its constraints, highlighting the limitations of the simpler model in accurately predicting clay mineral interactions.