Influence of Organic Molecules on the Luminescent Properties of Composites Based on CdS Quantum Dots

Abstract

The influence of methylene blue (MB) and acridine yellow (AY) dyes on the spectra of luminescence of CdS with quantum dots (QD) dye composites is investigated. It is shown that the luminescence spectrum of the heterosystem of nanocrystals (NC) CdS -the dye depends on the absorption region of it. The spectrum of the luminescence of the quantum dots is shifted to the red region by the introducing into colloidal solution of the MB dye and in a case of the insertion of AY the spectrum is shifted into the blue region. The obtained results are explained in a point of view of the transferring the energy from the CdS quantum dots to the dyes by the Forster mechanism.

NANOSTRUCTURED POROUS SILICA GLASS AS PROMISING MATERIAL FOR SENSORS (Review)

“…І нарешті, вона має бути нелюмінесціюючою (або світитися у ділянках спектру, що несуттєві для досліджуваної речовини). Деякі автори використовують як матрицю полімери [1] або желатину [1][2]. Ці сполуки світяться лише у ділянках спектру, що несуттєві для досліджуваної речовини і є досить хімічно інертними.…”

Gas Sensitivity of Some Nanoparticles Ensembles in Porous Glass

“…Such limitations include chemical inertness, mechanical durability, and its luminescent response may be present only in the spectrum regions that are not essential for the substance under investigation. Some authors use polymers [1][2] or gelatin [1,3] as a matrix. These compounds do not luminesce and are quite chemically inert.…”