MULTILAYER STRUCTURE FORMED BY LAYERS OF NANOPARTICLES HAVING ONE-DIMENSIONAL PHOTONIC CRYSTAL PROPERTIES, METHOD OF MAKING AND USING SAID STRUCTURE

摘要

FIELD: physics.;SUBSTANCE: multilayer mesoporous structure based on nanoparticles has Bragg reflector or one-dimensional photonic crystal properties. The one-dimensional photonic crystal is formed by alternating layers with different refraction indices and controlled size, made from nanoparticles. Each layer has thickness from 1 nm to 200 nm. The method of making said structure involves a) preparing suspensions of nanoparticles, where concentration thereof ranges from 1% to 99% and b) forming a multilayer structure with high continuous porosity and having one-dimensional photonic crystal properties via successive deposition on any substrate of layers nanoparticles of controlled thickness based on the suspensions described in a) so as form alternating refraction index values. Each layer of nanoparticles has thickness from 1 nm to 1 mcm. The number of layers of nanoparticles can vary from 1 to 100.;EFFECT: high reflection coefficient while simultaneously allowing passage of liquid, which enables controlled variation of the colour of the multilayer structure.;25 cl, 7 dwg