multilayer structure consisting of laminae of nanoparticles with unidimensional photonic crystal properties, process for its manufacture and its applications.

摘要

multilayer structure consisting of layers of nanoparticles with unidimensional photonic crystal properties, process for their preparation and their applications.; The object of the present invention is a mesoporous nanoparticulate multilayer structure and properties of a Bragg reflector or unidimensional photonic crystal in the ultraviolet, visible range and near infrared electromagnetic spectrum. This unidimensional photonic crystal is formed by laminae with different refractive index controlled thickness composed of nanoparticles that can be deposited on different types of substrates using a simple and reliable procedure. The periodic alternation of layers of different refractive index results in a strong reflectance readily observable to the naked eye or with a spectrophotometer measurable. Unlike other dense, reflective structures, the mesoporous structure of this reflector is such that allows the diffusion of liquids therethrough.