Distribution of CdSe nanoparticles synthesized in porous SiOx matrix

Photoluminescence spectra of CdSe nanoparticles synthesized by the chemical method from an aqueous solution are studied in relation to nanoparticle location over depth in the porous SiOx layer consisting of a set of distinct SiOx columns ∼(10–100) nm in diameter. An analysis of radiative characteristics of this structure shows that the distributions of different-size nanoparticle fractions over the nanocomposite layer depth are different. A model explaining the cause of such distributions is considered. Within this model the parameter defining the "constrained geometry" notion for the used conditions of CdSe nanoparticles' growth in the SiOx matrix is estimated.