Библиотека института физики им. Л.В. Киренского СО РАН

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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ding Y., Haskel D., Ovchinnikov S.G., Tseng Y.-Ch., Orlov Yu.S., Mao N-K.
Заглавие : A Novel Magnetic Transition in Magnetite Fe3O4 between 12-16 GPa
Место публикации : Phys. Rev. Lett. - 2008. - Vol. 100. - С. 045508
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Babkin E. V., Kiselev N. I., Pyn'ko V. G.
Заглавие : Characteristics of magnetite magnetoresistance
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 37, Is. 11. - P.3547-3549. - ISSN 0367-3294
Примечания : Cited References: 5
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : BABKIN E. V., CHERKUNOVA N. G.
Заглавие : ELECTRIC-FIELD EFFECT ON THE MAGNETIC-ANISOTROPY OF MAGNETITE
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1984. - Vol. 26, Is. 6. - P1818-1822. - ISSN 0367-3294
Примечания : Cited References: 14
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : BABKIN E. V., CHERKUNOVA N. G., OVCHINNIKOV S. G.
Заглавие : INVESTIGATION OF QUANTUM SIZE EFFECT IN MAGNETITE FILMS
Место публикации : Solid State Commun.: PERGAMON-ELSEVIER SCIENCE LTD, 1984. - Vol. 52, Is. 8. - P735-738. - ISSN 0038-1098, DOI 10.1016/0038-1098(84)90400-9
Примечания : Cited References: 8
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Barinov G. I., Babkin Y. V.
Заглавие : Influence of high-pressure thermal-treatment on the phase compound and phase-transformation kinetics of a system magnetite-wustite
Место публикации : Izvestiya vysshikh uchebnykh zavedenii Fizika. - 1990. - Vol. 33, Is. 5. - P.95-96. - ISSN 0021-3411; \b Russian Physics Journal; \b Известия высших учебных заведений. Физика
Примечания : Cited References: 4
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Svetlichnyi V. A., Shabalina A. V., Lapin I. N., Goncharova D. A., Velikanov D. A., Sokolov A. Е.
Заглавие : Characterization and magnetic properties study for magnetite nanoparticles obtained by pulsed laser ablation in water
Место публикации : Appl. Phys. A. - 2017. - Vol. 123, Is. 12. - Ст.763. - ISSN 09478396 (ISSN), DOI 10.1007/s00339-017-1390-7
Примечания : Cited References: 40. - This work was conducted as a government task of the Ministry of Education and Science of the Russian Federation, Project Number 3.9604.2017/8.9.
Ключевые слова (''Своб.индексиров.''): magnetite--pulsed laser ablation--nanoparticles--dispersion
Аннотация: Magnetite (Fe3O4) nanoparticles of 1–10 nm (with the maximum at 2 nm) were obtained via pulsed laser ablation of iron target in water in form of a stable dispersion without addition of surfactants and stabilizers. The structure of the material obtained was investigated using transmission electron microscopy, scanning electron microscopy, and Brunauer–Emmett–Teller methods. To investigate the composition of the particles in the sample, such methods as Fourier transform infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, and X-ray diffraction, were applied. Magnetite phase was found to be sufficiently pure, it was not contaminated by other iron oxide phases and contained not more than 0.5% of metallic iron in form of large particles. The study of the magnetic properties of the magnetite nanoparticles obtained has shown that they exhibit ferrimagnetic behavior at room temperature with the paramagnetic contribution explained by the presence of fine superparamagnetic particles.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov A. S., Rautskii M. V., Lukyanenko A. V., Volochaev M. N., Eremin E. V., Korobtsov V .V., Balashev V. V., Vikulov V. A., Solovyov L. A., Volkov N. V.
Заглавие : Characterization and magnetotransport properties of textured Fe3O4 films
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.O10.21. - P.465. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 2. - This work was partially supported by RFBR project no. 14-02-00234, the RAS «Far East» Program No 0262-2015-0057
Ключевые слова (''Своб.индексиров.''): magnetite--texture film--spin-dependent transport
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Komogortsev S. V., Stolyar S. V., Iskhakov R. S., Mohov A. A.
Заглавие : Core-shell exchange interaction effect in the approach to magnetic saturation of a magnetite-like nanoparticle
Коллективы : International Baltic Conference on Magnetism, Балтийский федеральный университет им. И. Канта
Место публикации : V International Baltic Conference on Magnetism. IBCM: Book of abstracts. - 2023. - P.40
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Ivanova O. S., Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Petrov D. A., Sukhachev A. L., Toropova E. S., Chun-Rong Lin, Ying-Zhen Chen
Заглавие : Core-shell magnetite nanoparticles: morphology, magnetic properties, organic dyes adsorption
Коллективы : "Functional materials", International conference, Крымский федеральный университет имени В.И. Вернадского
Место публикации : Ovchinnikov S. G. International conference "Functional materials": book of abstracts/ ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2023. - P.114
Примечания : Cited References: 1. - РФН № 23-22-10025
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Edelman I. S., Lin, Chun-Rong, Svetlitsky E. S., Sokolov A. Е., Lukyanenko, Kirill A., Sukhachev A. L., Shestakov N. P., Chen, Ying-Zhen, Spivakov, Aleksandr A.
Заглавие : Core–shell Fe3O4@C nanoparticles for the organic dye adsorption and targeted magneto-mechanical destruction of Ehrlich ascites carcinoma cells
Место публикации : Materials. - 2023. - Vol. 16, Is. 1. - Ст.23. - ISSN 19961944 (eISSN), DOI 10.3390/ma16010023
Примечания : Cited References: 65. - This research was funded partly by the Ministry of Science and Higher Education of the Russian Federation, project FWES-2021-0035. C.-R.L., Y.-Z.C. and A.A.S. thank the National Science and Technology Council of Taiwan for the financial support, Grants NSTC № 108-2923-M-153-001-MY3 and № 110-2112-M-153-005-. Magnetic investigations were carried out in the Center for Collective Use of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”
Аннотация: The morphology, structure, and magnetic properties of Fe3O4 and Fe3O4@C nanoparticles, as well their effectiveness for organic dye adsorption and targeted destruction of carcinoma cells, were studied. The nanoparticles exhibited a high magnetic saturation value (79.4 and 63.8 emu/g, correspondingly) to facilitate magnetic separation. It has been shown that surface properties play a key role in the adsorption process. Both types of organic dyes—cationic (Rhodomine C) and anionic (Congo Red and Eosine)—were well adsorbed by the Fe3O4 nanoparticles’ surface, and the adsorption process was described by the polymolecular adsorption model with a maximum adsorption capacity of 58, 22, and 14 mg/g for Congo Red, Eosine, and Rhodomine C, correspondingly. In this case, the kinetic data were described well by the pseudo-first-order model. Carbon-coated particles selectively adsorbed only cationic dyes, and the adsorption process for Methylene Blue was described by the Freundlich model, with a maximum adsorption capacity of 14 mg/g. For the case of Rhodomine C, the adsorption isotherm has a polymolecular character with a maximum adsorption capacity of 34 mg/g. To realize the targeted destruction of the carcinoma cells, the Fe3O4@C nanoparticles were functionalized with aptamers, and an experiment on the Ehrlich ascetic carcinoma cells’ destruction was carried out successively using a low-frequency alternating magnetic field. The number of cells destroyed as a result of their interaction with Fe3O4@C nanoparticles in an alternating magnetic field was 27%, compared with the number of naturally dead control cells of 6%.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balashev V. V., Ermakov K. S., Samardak A. Y., Ognev A. V., Samardak A. S., Komogortsev S. V., Volochaev M. N., Tarasov A. S., Korobtsov V. V.
Заглавие : Crystal texture-dependent magnetic and magnetotransport properties of half-metallic Fe3O4 films grown on oxidized Si substrates by reactive deposition
Место публикации : J. Alloys Compd. - 2020. - Vol. 815. - Ст.152398. - ISSN 09258388 (ISSN), DOI 10.1016/j.jallcom.2019.152398
Примечания : Cited References: 58. - his work is supported in part by the Russian Ministry of Science and Higher Education under the state tasks ( 3.5178.2017/8.9 and 3.4956.2017 ), by Act 211 of the Government of the Russian Federation (contract No. 02.A03.21.0011 ) and by the Comprehensive Program of Basic Research of the Far Eastern Branch of the Russian Academy of Sciences “Far East” 2018–2020 № 18-3-022 ( 0226-18-0031 ).
Аннотация: Nanocrystalline magnetite (Fe3O4) films with various preferred crystallite orientations were grown on oxidized silicon surface by reactive iron deposition in an oxygen atmosphere. Depending on the partial pressure of oxygen (PO2), the evolution of the structural, magnetic, and magnetotransport properties of the grown films was investigated. We found that the growth of films containing only the Fe3O4 phase occurs in a certain PO2 range, and the magnetite crystallites may have (311) or (110) preferred orientation. It was revealed that films with (311) and (110) textures have a column structure. An increase in the PO2 leads to a structure transformation from (311) to (110) texture with larger crystallites. A film with (110) texture showed higher values of saturation magnetization, magnetoresistance and spin polarization. The analysis of approach to magnetic saturation revealed that the local magnetic anisotropy of crystallites in textured films is much higher than the anisotropy of bulk magnetite due to the large surface contribution. The FORC diagram method in combination with the approach to magnetic saturation proved the existence of the exchange coupling between large and small grains. Our results open the reliable route for crystal texture-depending manipulation of functional properties of thin magnetite films for advanced spintronic applications.
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12.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Semenov S. V., Balaev D. A., Shaikhutdinov K. A., Rogozin D. Yu.
Заглавие : Day plots of bacterial magnetite from sediments of Lake Shira (Khakassia, Russia)
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P12.1. - P.557. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3. - The work was supported by Russian Foundation for Basic Research and Krasnoyarsk Regional Scientific Foundation, Grant No. 15-45-04272
Ключевые слова (''Своб.индексиров.''): nanoparticles--magnetic hysteresis--bacterial magnetite
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Semenov S. V., Balaev D. A., Shaykhutdinov K. A., Rogozin D. Y.
Заглавие : Day plots of bacterial magnetite from sediments of shira lake (Khakassia, Russia)
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 2. - P.252-256. - ISSN 1997-1397, DOI 10.17516/1997-1397-2017-10-2-252-256; Журн. СФУ. Сер. "Математика и физика"
Примечания : Cited References: 4
Ключевые слова (''Своб.индексиров.''): nanoparticles--magnetic hysteresis--bacterial magnetite--наночастицы--магнитный гистерезис--бактериальный магнетит
Аннотация: The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles (˂ 100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene.Исследовано доменное состояние магнетита, обнаруженного в донных отложениях озера Шира (Хакасия, Россия). Из анализа экспериментальных данных по намагниченности образцов с разных участков керна донных отложений, а также на основе графиков Дэя сделан вывод, что частицы магнетита находятся в псевдооднодоменном состоянии. Это указывает на малый размер частиц магнетита (˂ 100 nm) и подтверждает их бактериальное происхождение. Биогенный магнетит, содержащийся в донных отложениях, может служить индикатором климатических изменений в уровне озера Шира в позднем голоцене.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kirillov V. L., Yakushkin S. S., Balaev D. A., Dubrovskiy A. A., Semenov S. V., Knyazev Yu. V., Bayukov O. A., Velikanov D. A., Yatsenko D. A., Martyanov O. N.
Заглавие : Dimethylsulfoxide as a media for one-stage synthesis of the Fe3O4-based ferrofluids with a controllable size distribution
Место публикации : Mater. Chem. Phys. - 2019. - Vol. 225. - P.292-297. - ISSN 02540584 (ISSN) , DOI 10.1016/j.matchemphys.2019.01.003
Примечания : Cited References: 36. - This work was supported by the Russian Science Foundation , project no. 17-12-01111.
Ключевые слова (''Своб.индексиров.''): ferrofluid--magnetite nanoparticles--one-step synthesis--superparamagnetic nanoparticles--ferromagnetic resonance
Аннотация: The ultrafine (d = 4 nm) magnetite ferrofluid with a narrow nanoparticle size distribution has been synthesized in one stage at room temperature from a solution of iron(II) and (III) chlorides in dimethylsulfoxide (DMSO) with the propylene epoxide admixture. This is the first example of obtaining a stable concentrated ultrafine magnetite/DMSO ferrofluid at room temperature. X-ray diffraction, transmission electron microscopy, ferromagnetic resonance, Mossbauer spectroscopy, and magnetostatic study have been used to elucidate the role of DMSO and the H2O/DMSO ratio in the formation of a stable colloid with a desired nanoparticle size. The initial stages of the magnetite nanoparticles formation have been investigated by the ferromagnetic resonance technique.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kilin V. I., Yakubailik E. K., Kostenenko L. P., Ganzhenko I. M.
Заглавие : Dressability of abagas hematite-magnetite ores
Место публикации : J. Min. Sci. - 2012. - Vol. 48, Is. 2. - P.363-368. - ISSN 1062-7391, DOI 10.1134/S1062739148020189
Примечания : Cited References: 3
Ключевые слова (''Своб.индексиров.''): magnetite--hematite--ilvaite--dry--wet--high-gradient magnetic separation--jigging
Аннотация: A number of magnetic separation processes are used to study preparability of two main hematite-magnetite and magnetite-muscovite ore types extacted it the Abagas iron ore deposit. The dry magnetic separation results were judged as acceptable for the rough processing stage, while the products of the wet magnetic separation were the high-grade iron ore concentrates. The two-stage beneficiation tests on complex hematite-magnetite ores demonstrated much higher cumulative iron recovery from the test ore.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DROKIN N. A., AKSENOVA E. Y., MAMALUI Y. A.
Заглавие : PHOTOCONDUCTIVITY IN TIN-DOPED MAGNETITE
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1984. - Vol. 26, Is. 6. - P1837-1838. - ISSN 0367-3294
Примечания : Cited References: 5
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivantsov R. D., Lin C. -R., Chen Y. -Z., Ivanova O. S., Altunin R. R., Knyazev Yu. V., Molokeev M. S., Zharkov S. M., Shestakov N. P., Sukhachev A. L., Edelman I. S.
Заглавие : Effect of surfactants on the structure, phase composition, and magnetic properties of FexSy nanoparticles synthesized by thermal decomposition
Место публикации : Nanobiotechnol. Rep. - 2022. - Vol. 17, Is. 3. - P.336-344. - ISSN 26351676 (ISSN), DOI 10.1134/S2635167622030089
Примечания : Cited References: 27. - This study was supported by the Russian Foundation for Basic Research with Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project no. 19-42-240005: “Features of the Electronic Structure, Magnetic Properties, and Optical Excitations in Nanocrystals of Multifunctional Magnetic Chalcogenides Fe3S4 and FeSe” and the Russian Foundation for Basic Research and the Ministry of Science and Technology of Taiwan, joint projects nos. 19-52-52002 and 109-2112-M-153-003 and 108-2923-M-153-001-MY3The electron-microscopy study was carried out at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research code FSRZ-2020-0011). The magnetic measurements were carried out on a vibrating sample magnetometer at the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
Аннотация: The effect of surfactants on the structure, morphology, and magnetic properties of FexSy iron-sulfide nanoparticles synthesized by thermal decomposition is studied. Oleylamine, hexadecylamine, and octadecylamine are used as surfactants. It is established by X-ray and electron-diffraction analysis combined with Mossbauer spectroscopy that, in samples 1 and 2 prepared using oleylamine and hexadecylamine, respectively, the Fe3S4 greigite phase dominates, with an inverse spinel structure isostructural to the iron oxide Fe3O4 magnetite with minor Fe9S11 impurities. Deviations in the distribution of iron cations over the tetrahedral and octahedral sites relative to the bulk greigite crystals are observed. The nanoparticles synthesized using octadecylamine (sample 3) are found to be multiphase with a greigite fraction of ~20%. In all three cases, as showed the results of transmission electron microscopy and Fourier transform infrared spectroscopy together with thermogravimetry analysis, the magnetic nanoparticles have an organic shell chemically bonded to their magnetic core, which prevents the agglomeration of the particles. This shell is much more massive in samples 2 and 3. The magnetization values for samples 1 and 2 are similar to those of greigite nanoparticles reported in publications, while the magnetization of sample 3 is several times lower, in accordance with the greigite fraction in it. The combination of fairly high magnetization with a massive organic shell allows one to consider hexadecylamine to be a promising surfactant for the synthesis of iron-sulfide nanoparticles protected from external impact and agglomeration.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondarenko L. S., Kovel E. S., Kydralieva K. A., Dzhardimalieva G. I., Illes E., Tombacz E., Kicheeva A. G., Kudryasheva N. S.
Заглавие : Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions
Место публикации : Nanomaterials. - 2020. - Vol. 10, Is. 8. - Ст.1499. - P.1-20. - ISSN 20794991 (ISSN), DOI 10.3390/nano10081499
Примечания : Cited References: 83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003)
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yaroslavtsev R. N., Tyumentseva A.V., Velikanov D. A., Vazhenina I. G., Volochaev M. N., Stolyar S. V.
Заглавие : Fe3O4/Au nanocomposites: Characterization and cytotoxicity effects in vitro
Колич.характеристики :8 с
Место публикации : Mater. Chem. Phys. - 2024. - Vol. 322. - Ст.129524. - ISSN 02540584 (ISSN), DOI 10.1016/j.matchemphys.2024.129524. - ISSN 18793312 (eISSN)
Примечания : Cited References: 44
Аннотация: Magnetic nanocomposites containing iron oxide and gold components take great attention last years because of their relative biocompatibility and the ability to combine the magnetic properties of iron and the chemical bonding properties of gold for the possible drug delivery or diagnostics for various diseases. However, such particles have some toxicity to living cells, and the effect depends on many factors, including size, shape, the ratio of components in the composites, and the type of cells affected. And thus, the search for compositions and technologies for producing iron-gold particles with improved properties and reduced cytotoxicity remains relevant. The aim of the study was to synthesize and characterize Fe3O4/Au nanocomposites and evaluate their influence on living cells using the example of cell line HEK293. Fe3O4 nanoparticles (NPs) were synthesized by co-precipitation of Fe2+/Fe3+ water solution in alkaline conditions and then boiled with HAuCl4 in 0.1 M sodium citrate. The NPs properties were estimated by transmission electron microscopy (TEM), vibration magnetometry and ferromagnetic resonance (FMR). According to magnetometric measurements, nanoparticles are mainly in a superparamagnetic state. By fitting magnetization curves, the magnetic characteristics of nanoparticles were determined: saturation magnetization (59.3 emu/g) and magnetic anisotropy constant (K = 0.86·105 erg/cm3). The average particle size estimated from magnetic measurements was 8.7 nm. Considering the presence of a magnetically dead layer, this is in good agreement with the TEM results. The temperature dependence of the FMR linewidth was analyzed using two models. As a result, the parameters MSV and K/MS were determined. The models used showed good agreement. The values of the anisotropy constant (K = 1.06·105 erg/cm3) and the average particle size (6.8 nm) are estimated. The effect of the NPs on the HEK293 cells was studied by MTT-assay, flow cytometry and RT-PCR. The exposure with the NPs lead to a significant decrease of cell metabolic activity in HEK293 cell culture, but this effect was not accompanied by cell death. It was shown that the expression of antioxidant enzymes SOD1 and GPX1 was reduced at the mRNA stage. So the NPs synthesized may affect gene expression and metabolism of HEK293 cells, but this does not have fatal consequences for cell viability.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kicheeva A. G., Sushko E. S., Bondarenko L. S., Kydralieva K. A., Pankratov D. A., Tropskaya N. S., Dzeranov A. A., Dzhardimalieva G. I., Zarrelli M., Kudryasheva N. S.
Заглавие : Functionalized magnetite nanoparticles: Characterization, bioeffects, and role of reactive oxygen species in unicellular and enzymatic systems
Место публикации : Int. J. Mol. Sci. - 2023. - Vol. 24, Is. 2. - Ст.1133. - ISSN 16616596 (ISSN), DOI 10.3390/ijms24021133. - ISSN 14220067 (eISSN)
Примечания : Cited References: 125. - This research was funded by Russian Science Foundation, N 22-73-10222
Аннотация: The current study evaluates the role of reactive oxygen species (ROS) in bioeffects of magnetite nanoparticles (MNPs), such as bare (Fe3O4), humic acids (Fe3O4-HA), and 3-aminopropyltriethoxysilane (Fe3O4-APTES) modified MNPs. Mössbauer spectroscopy was used to identify the local surrounding for Fe atom/ions and the depth of modification for MNPs. It was found that the Fe3O4-HA MNPs contain the smallest, whereas the Fe3O4-APTES MNPs contain the largest amount of Fe2+ ions. Bioluminescent cellular and enzymatic assays were applied to monitor the toxicity and anti-(pro-)oxidant activity of MNPs. The contents of ROS were determined by a chemiluminescence luminol assay evaluating the correlations with toxicity/anti-(pro-)oxidant coefficients. Toxic effects of modified MNPs were found at higher concentrations (10−2 g/L); they were related to ROS storage in bacterial suspensions. MNPs stimulated ROS production by the bacteria in a wide concentration range (10−15–1 g/L). Under the conditions of model oxidative stress and higher concentrations of MNPs (10−4 g/L), the bacterial bioassay revealed prooxidant activity of all three MNP types, with corresponding decay of ROS content. Bioluminescence enzymatic assay did not show any sensitivity to MNPs, with negligible change in ROS content. The results clearly indicate that cell-membrane processes are responsible for the bioeffects and bacterial ROS generation, confirming the ferroptosis phenomenon based on iron-initiated cell-membrane lipid peroxidation.
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