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Journal of Nanomaterials
Volume 2009, Article ID 879016, 5 pages
http://dx.doi.org/10.1155/2009/879016
Research Article

Formation and Characterization of Nanomaterials Dried under Supergravity Conditions

1Departamento de Metalmecánica, Instituto Tecnológico de Zacatepec, Calzada Tecnológico 27, 62780 Zacatepec, MOR, Mexico
2Centro de Investigación en Energía, Universidad Nacional Autónoma de México, Privada Xochicalco s/n, Col. Centro, 62580 Temixco, MOR, Mexico

Received 7 May 2008; Accepted 12 January 2009

Academic Editor: Donald Bansleben

Copyright © 2009 Minerva Vargas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The elaboration of bilayer films dried under terrestrial gravity conditions ( ) and on a centrifuge with 1.3 and 7 is reported. The changes in microstructure and thickness of these coatings under supergravity environment cause a red-shift tendency in the optical properties at increasing values of acceleration. Experiments of a drop under enhanced gravity force in the range of 3.7 < Bo (bond number) < 51.5 suggest the incomplete elimination of surfactant-water molecules in the bilayer film. Increasing acceleration up to 14 will widen the optical differences found, proving the layer-by-layer solution-chemical method in combination with these drying protocols, an alternative to produce thickness-sensitive solar-selective absorbing coatings.