Preparation and characterization of cerium-samarium oxide nanoparticles
Pavel D. Strokin1, Ekaterina А. Goryacheva1, Irina Yu. Goryacheva1, Nelly R. Popova2, Olga А. Goryacheva1
1Saratov State University, Saratov, Russia
2Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino, Moscow, Russia
Abstract
Luminescent nanoparticles based on oxides of rare earth elements are characterized by low toxicity and the possibility of easy surface functionalization. These advantages open up opportunities for their application in optics, energy, bioanalysis and other fields. Doping of cerium oxide nanoparticles with rare earth elements (including samarium) opens up prospects for the creation of multimode sensors (with a combination of photoluminescence analysis and contrast generation for MRI). However, to date, the luminescent properties of cerium oxide and its doping options with rare earth elements remain insufficiently studied. There are many ways to produce cerium nanoparticles. Most of the known methods are complex, time-consuming, laborious, and practically impossible to obtain ultra-small nanoparticles. An alternative is high-temperature organometallic synthesis.
In this work, cerium-samarium oxide nanoparticles were obtained by high-temperature organometallic synthesis. The dependence of the crystal shape and size on the synthesis conditions was confirmed, which is consistent with the literature data. After purification of the obtained nanoparticles using precipitators, a decrease in the quantum yield of photoluminescence was noted. Nanoparticles purified without the use of precipitators retain their original quantum yield. These particles are colloidically stable and retain the potential for further modification and application in bioanalysis.
The work was supported by the Russian Science Foundation (project No. 22-63-00082).
Speaker
Pavel Strokin
Saratov State University
Russia
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