Artículos de revistas
The use of colloidal ferrofluid as building blocks for nanostructured layer-by-layer films fabrication
Fecha
2010Registro en:
JOURNAL OF NANOPARTICLE RESEARCH, v.12, n.8, p.2779-2785, 2010
1388-0764
10.1007/s11051-010-9855-z
Autor
PEREIRA, A.
ALVES, S.
CASANOVA, M.
ZUCOLOTTO, Valtencir
BECHTOLD, I. H.
Institución
Resumen
The electrostatic layer-by-layer technique has been exploited as an useful strategy for fabrication of nanostructured thin films, in which specific properties can be controlled at the molecular level. Ferrofluids consist of a colloidal suspension of magnetic grains (with only a few nanometers of diameter) with present interesting physical properties and applications, ranging from telecommunication to drug delivery systems. In this article, we developed a new strategy to manipulate ferrofluids upon their immobilization in nanostructured layered films in conjunction with conventional polyelectrolytes using the layer-by-layer technique. We investigated the morphological, optical, and magnetic properties of the immobilized ferrofluid as a function of number of bilayers presented in the films. Ferrofluid/polyelectrolyte multilayers homogeneously covered the substrates surface, and the magnetic and optical properties of films exhibited a linear dependence on the number of bilayers adsorbed.