Application prospects of nanomaterials  is connected with features of their physical and chemical properties. One of the features of nanomaterials is possibility of management of properties nanomaterials by changing their sizes and geometry. In this case it is possible to changing their properties without changing chemical compound of nanomaterials

In the given work it is developed reception method of nanoparticles sulphide of copper from nanoparticles sulphide of cadmium by an ionic exchange.

The technology of reception of nanoparticles is consisted following stages: formation nanoparticles cadmium sulphide in the volume of a polymeric matrix by means of successive ionic layer adsorption and reaction (SILAR) ; transformation nanoparticles CdS→CuS by an exchange of  ions of cadmium with ions of copper from solutions CuSO₄.

By means of SILAR have been formed CdS nanoparticles in a polymer matrix with 3 and 5 growth cycles. After that samples have been placed in water solution CuSO₄ with concentration of 0,05 M and 0,001 M.  After ionic exchange samples dried up.  

Optical and other characteristics of these samples have been measured. Have been defined the optical band gap of samples depending on time of an ionic exchange. Results of the spent researches have shown, character of change of band gap depends on concentration of solutions. In the changing of time from 0 to 120 minutes at concentration of solutions CuSO₄ of 0,001 M the band gap varies in the range of 3,65 eV-2,89 eV, and at concentration of 0,05 M in the range of 3,65 eV-2,97 eV. By means of EDAX the element composition of the received structures depends on time of an ionic exchange has been studied.  Results of the spent researches show that for samples of 1 growth cycle (the sizes of particles d ~ 3nm) at the initial stage of an ionic exchange the quantity of ions of copper sharply increases. When the time of sorbtion achieved 3 minutes saturation is reached. Delay of process of an ionic exchange is connected with reduction of atoms of cadmium in shape of nanoparticles. Character of this process depends on the sizes of particles and concentration of solutions.

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1. Featurs Of electric Properties  Of nanocomposites  On The Basis Of Copper Sulfide and Polyvinil Alcohol
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