Katerina Lazarova

TL;DR: In this paper, the optical properties of thin Nb2O5 films, obtained by spin coating of Nb sol on glass and silicon substrates, were investigated using nonlinear curve fitting.

TL;DR: The preparation of responsive multilayered structures with quarter-wave design based on layer-by-layer deposition of sol-gel derived Nb2O5 films and spin-coated MEL type zeolite is demonstrated and the quasi-omnidirectional photonic band is predicted theoretically, and confirmed experimentally by reflectance measurements at oblique incidence with polarized light.

TL;DR: The reversible response of the Bragg stacks towards acetone without additional annealing opens up the possibility of preparing sensors with optical read-out by incorporation of sensitive and transducer elements into a single device.

TL;DR: Fly ash from lignite coal combusted in different Thermal Power Plants was used for the synthesis of zeolites (FAZs) of the Na-X type by alkaline activation via three laboratory procedures, characterized with respect to their morphology, phase composition and surface properties, which predetermine their suitability for applications as catalysts and adsorbents.

TL;DR: In this paper, the fabrication and characterization of one-dimensional photonic crystals (1D-PC) in the form of quarter-wavelength multilayered stack (Bragg stack) are presented.