Speaker
Description
One of the key tasks, the solution of which requires exploratory research, is the assessment of the combined effect of ionizing radiation and model buffer solutions on the stability of the crystalline structure of iron-containing nanocomposites based on ZnFe2O4. Interest in this area of research is primarily due to the great prospects for using this type of structure as a basis for hyperthermic tests, as well as the possibility of using them in the biomedical field, including in cases where exposure to ionizing radiation can be used for therapeutic purposes.
The work presents the results of assessment of the effect of gamma and electron irradiation on changes in the structural properties of ZnFe2O4 nanostructured composites, as well as determination of the role of changes in the phase composition of composites on the resistance to structural destruction caused by the simultaneous exposure to ionizing radiation and model buffer solutions. During the studies conducted it was established that the change in phase composition due to the formation of a highly ordered cubic phase of ZnFe2O4 in the composition of composites with inclusions in the form of ZnO leads to a growth in resistance to ionizing radiation processes associated with the destruction of the main phase due to ionization processes. At the same time, the formation of inclusions of hematite Fe2O3 in the structure of nanocomposites results in acceleration of destabilization processes of the crystalline structure of the composite in the buffer solution under the action of ionizing radiation. In this case, the intensification of destabilization processes is due to the weak resistance of hematite to oxidation processes caused by the simultaneous action of the buffer solution and ionizing radiation. The conducted studies established that the effect of gamma and electron irradiation with small doses (less than 50 kGy) does not have a significant effect on the structural features of nanocomposites and the results of hyperthermic tests, while an increase in the irradiation dose above 50 kGy leads to destabilization of the crystalline structure of nanocomposite samples, which reduces the effectiveness of hyperthermic tests.
The results obtained in this study make it possible to expand the general understanding of the influence of ionizing radiation on the structural features of iron-containing nanocomposites, which have great potential for use in biomedical applications, including as materials for hyperthermic testing.
