pH-dependent kinetics of MgCl2 adsorption under a fatty-acid Langmuir film.
Eur Phys J E Soft Matter
; 20(4): 387-94, 2006 Aug.
Article
en En
| MEDLINE
| ID: mdl-16927026
ABSTRACT
The effect of subphase pH (5.5 and 10.5) on the structure of behenic-acid monolayers was investigated during Mg(2+) adsorption by means of Grazing Incidence X-ray Diffraction (GIXD) and Brewster Angle Microscopy (BAM). The final phase corresponding to an ion superlattice commensurate to the behenic-acid cell is pH-independent. In contrast, the sequence of phases evidenced from the initial L(2)-phase to this final state presents at pH 10.5 an additional stage associated to a film condensation toward the L' (2)-phase. The structures of the intermediate states preceding the superstructure nucleation are slightly different, both with a short-range fatty-acid order. Finally, a laser light effect that could result from visible light absorption by the inorganic complexes is evidenced in the final state as well as in the intermediate phases.
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Banco de datos:
MEDLINE
Asunto principal:
Cloruro de Magnesio
/
Ácidos Grasos
/
Membrana Dobles de Lípidos
/
Membranas Artificiales
/
Modelos Químicos
Idioma:
En
Año:
2006
Tipo del documento:
Article