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Teoret. i eksperim. khimiya. 2006. Vol.42 No. 3. p. 150-155

Spectral and Photochemical Properties of CdSe Nanoparticles,
Stabilized in Polymer-Containing Media

 

A. E. Raevskaya1, A. L. Stroyuk1, S. Ya. Kuchmy1, Yu. M. Azhnyuk2,
V. M. Dzhagan3, M. Ya. Valakh3


1 L. V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine
Prosp. Nauky, 31, Kyiv 03028, Ukraine. E-mail: stroyuk@inphyschem-nas.kiev.ua

2 Institute of Electronic Physics, National Academy of Sciences of Ukraine
Vul. Universytetska, 21, Uzhgorod 88017, Ukraine. E-mail: azh@mail.uzhgorod.ua

3 V. E. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
Prosp. Nauky, 45, Kyiv 03028, Ukraine. E-mail: dzhagan@isp.kiev.ua


Optical properties of CdSe nanoparticles synthesized in aqueous solutions and polymer films by reaction between cadmium chloride and sodium selenosulfate, were studied. The basic parameters of the reaction mixture that affect the band gap were characterized. The analysis of absorption, photoluminescence, Raman scattering and non-stationary bleaching spectra of CdSe nanoparticles of different size were per- formed. It was shown that under impulse irradiation CdSe nanoparticles can accumulate excessive elec- trons and induce redox-reactions of the solution components - dioxygen, methylviologen and sulfite-ions.


Key word CdSe nanoparticles, sodium selenosulfate, optical properties, photoluminescence, Raman scattering,
Burstein-Moss effect, impulse photolysis.