Second-Harmonic Scattering in Layered Double Hydroxide Colloids: A Microscopic View of Adsorption and Intercalation
Pierre-Marie Gassin1, Bénédicte Prelot1, Brian Grégoire2
1Institut Charles Gerhardt de Montpellier, UMR-5253 CNRS-UM-ENSCM , C.C. 1502 Place Eugene Bataillon , F-34095 Montpellier Cedex 5, France.
Abstract:
The interaction of methyl orange dye with a layered double hydroxide colloidal material is investigated using real-time polarization-resolved second-harmonic scattering (SHS). Interlayer charge compensating anion exchange is studied from initial carbonate or nitrate anions to methyl orange negatively charged dye. A theoretical model, taking into account the field retardation effect, is presented to simulate the polarization-resolved SHS experiments. Various geometrical dye configurations inside or around the host material have been modeled. A comparison with the experimental data permits to give a microscopic description of the dye organization and its time evolution during the intercalation process in the material.
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