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Mesostructured Thin Films as Responsive Optical Coatings of Photonic Crystals
Author(s) -
Hidalgo Nuria,
Calvo Mauricio E.,
Míguez Hernán
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200900411
Subject(s) - materials science , photonic crystal , mesoporous material , coating , thin film , optoelectronics , porosity , photonics , isothermal process , oxide , nanotechnology , composite material , chemistry , catalysis , biochemistry , physics , metallurgy , thermodynamics
A synthetic route is presented to attain high‐optical‐quality multilayered structures that result from coupling ordered mesoporous titanium oxide thin films to the surface of a dense one‐dimensional photonic crystal. Such architectures present spectrally well‐defined photon resonant modes localized in the outer coating that finely respond to physicochemically induced modifications of its pore volume. The potential of these porous coatings in detection of environmental changes through variations of the photonic response of the ensemble is demonstrated by performing isothermal optical reflectance measurements under controlled vapor‐pressure conditions.