INVESTIGADORES
ANGELOME Paula Cecilia
artículos
Título:
Mesoporous multilayer thin films: environment-sensitive photonic crystals
Autor/es:
GALO J. A. A. SOLER-ILLIA; M. CECILIA FUERTES; PAULA C. ANGELOMÉ; M. CLAUDIA MARCHI; HORACIO TROIANI; VITTORIO LUCA; HERNÁN MÍGUEZ
Revista:
Activity Report LNLS 2007
Editorial:
Laboratorio Nacional de Luz Sincrotrón
Referencias:
Año: 2008 p. 13 - 17
ISSN:
1518-0204
Resumen:
Photonic Crystals made up of stacked mesoporous thin films (MTF) were produced by sequential deposition. These materials present order at different length scales: atomic (local structure), mesoscopic (ordered mesopores) and submicronic (controlled thickness), which were accurately assessed by Small Angle X-ray Scattering (2D SAXS, D11A SAXS1) and X-ray Reflectometry (XRR, D10A XRD2). Each MTF building block of a complex multilayer architecture behaves like an optical switch in the presence of vapours. Its electronic density (and therefore the refractive index) changes due to capillary condensation of a given solvent within the pore systems. This allows for the creation of photonic crystals that are responsive to environment, with promising applications in selective sensing or active waveguides.
