najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2022-13-4-414-429najo-252Research ArticleСтатьиStudy of the structure and bioactivity of powdered iron oxides synthesized by sol-gel methodKhamovaT. V.tamarakhamova@gmail.comShilovaO. A.olgashilova@bk.ruGorshkovaYu. E.yulia.gorshkova@jinr.ruTsvigunN. V.n_tsvigun@mail.ruGerashchenkoO. V.gerashchenko_ov@pnpi.nrcki.ruBaranchikovA. E.a.baranchikov@yandex.ruUdalovaO. R.udal59@inbox.ruZhuravlevaA. S.zhuravlan@gmail.comPanovaG. G.gaiane@inbox.ruKopitsaG. P.kopitsa_gp@pnpi.nrcki.ruInstitute of Silicate Chemistry of Russian Academy of SciencesRussian FederationJoint Institute for Nuclear ResearchRussian FederationInstitute of Crystallography Federal R&D Center “Crystallography and Photonics” of the Russian Academy of SciencesRussian FederationPetersburg Nuclear Physics Institute named by B. P. Konstantinov of National Research Centre Kurchatov InstituteRussian FederationKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of SciencesRussian FederationAgrophysical Research InstituteRussian FederationInstitute of Silicate Chemistry of Russian Academy of Sciences; Petersburg Nuclear Physics Institute named by B. P. Konstantinov of National Research Centre Kurchatov InstituteRussian Federation202206062025134414429Copyright © Khamova T.V., Shilova O.A., Gorshkova Y.E., Tsvigun N.V., Gerashchenko O.V., Baranchikov A.E., Udalova O.R., Zhuravleva A.S., Panova G.G., Kopitsa G.P., 20252025Khamova T.V., Shilova O.A., Gorshkova Y.E., Tsvigun N.V., Gerashchenko O.V., Baranchikov A.E., Udalova O.R., Zhuravleva A.S., Panova G.G., Kopitsa G.P.Khamova T.V., Shilova O.A., Gorshkova Y.E., Tsvigun N.V., Gerashchenko O.V., Baranchikov A.E., Udalova O.R., Zhuravleva A.S., Panova G.G., Kopitsa G.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/252

Magnetite (Fe3O4) and maghemite with an admixture of hematite (γ-Fe2O3/ α-Fe2O3) powders are synthesized via sol-gel process and characterized using XRD, SEM, low temperature nitrogen adsorption, small-angle X-ray scattering (SAXS) and small-angle polarized neutron scattering (SAPNS). The synthesized γ-Fe2O3/ α-Fe2O3 and Fe3O4 samples are found to be porous systems featuring with a three-level hierarchically organized structure with different intrinsic scales and aggregation types for each of the structural levels. For both materials, the intrinsic size of the highest level exceeds 70 nm, and magnetic structure involves super-paramagnetic particles with a characteristic radius of magnetic-nuclear cross-correlations R_MN ≈ 3 nm. The biological activity of γ-Fe2O3/ α-Fe2O3 and Fe3O4 aqueous suspensions in certain concentrations in respect to seed treatment, growth and productivity of plants was studied using the example of spring barley variety Leningradsky under adjustable favorable conditions and physical modeling of stress effects (irradiation with high-intensity UV-B radiation, soil moisture deficiency).

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The authors declare that there are no conflicts of interest present.