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 introduction into the 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.
Highlights
One of the features of crystals having a nanoscale range and isolated in a polymer matrix is the essential chemical activity of its surface
Particular importance is the study of complex hybrid systems, consisting of semiconductor quantum dots (QD)
Colloidal quantum dots (CdS, CdSe, CdTe, ZnS, ZnSe) with porphyrin molecules, phthalocyanines, dyes could be useful as models of hybrid nanostructures for various applications
Summary
One of the features of crystals having a nanoscale range and isolated in a polymer matrix is the essential chemical activity of its surface. Heterogeneous systems contain nanocomposites and nanostructures created by nanoobjects with different optical characteristics. Properties of such nanostructures are due to the presence of heterogeneities, boundaries, which lead to complex interactions of the electromagnetic field with structural elements. Colloidal quantum dots (CdS, CdSe, CdTe, ZnS, ZnSe) with porphyrin molecules, phthalocyanines, dyes could be useful as models of hybrid nanostructures for various applications. The urgency of the research of such nanosystems is due, firstly, to the possibility of generating generalizations of physical interactions between the components of heterocomposites, and secondly, a large range of applications in photocatalysts, photovoltaic devices, biosensors that are promising for introduction into biomedicine and environment [1,2,3,4,5,6]. One of the most promising materials for the creation of hybrid structures is the methylene blue (MB) dye
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