Resumo

BOKHIMI, Хіm; VEGA-GONZALEZ, Marina  e  MORALES, Antonio. Atomic distribution and morphology of the micelles in sols precursors of boehmite, bismuthinite, hydrotalcite and rutile. TIP [online]. 2006, vol.9, n.1, pp.12-18. ISSN 1405-888X.

Sols of boehmite, bismuthinite, Hydrotalcite and rutile were prepared. The micelles of the sols were characterized by using X-ray powder diffraction and transmission electron microscopy. For all sols, the micelles were nanocapsules with diameters between 20 and 100 nm and a shell thickness between 3 and 4 nm, where the atoms formed clusters that ordered with a non-translational symmetry. When the micelles interacted each other, the atoms in the capsules shells changed their ordering from the one in the atomic clusters into the one that corresponds to the crystalline structure of the phase from which the sol was precursor. The interaction between the nanocapsules produced their aggregation to build porous three-dimensional structures, or one-dimensional structures that transformed into nanotubes, nanobars, or into three-dimensional nets that eventually form a gel.

Palavras-chave : Crystallization; interaction between micelles; micelles; nanocapsules; sol.

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