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Article

Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

1
School of Non-Ferrous Metals and Material Science, Siberian Federal University, 660041 Krasnoyarsk, Russia
2
Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036 Krasnoyarsk, Russia
3
Institute of Agroecological Technologies, Krasnoyarsk State Agrarian University, 660049 Krasnoyarsk, Russia
4
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Akademgorodok, 660036 Krasnoyarsk, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: Houshang Alamdari, Jan Vrestal and Emin Bayraktar
Metals 2021, 11(5), 705; https://doi.org/10.3390/met11050705
Received: 9 March 2021 / Revised: 16 April 2021 / Accepted: 20 April 2021 / Published: 25 April 2021
(This article belongs to the Special Issue Metal-Containing Nanoparticles for Biomedical Applications)
During the past few decades, hybrid nanoparticles (HNPs) based on a magnetic material and gold have attracted interest for applications in catalysis, diagnostics and nanomedicine. In this paper, magnetic CoFe2O4/Au HNPs with an average particle size of 20 nm, decorated with 2 nm gold clusters, were prepared using methionine as a reducer and an anchor between CoFe2O4 and gold. The methionine was used to grow the Au clusters to a solid gold shell (up to 10 gold deposition cycles). The obtained nanoparticles (NPs) were studied by X-Ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR) spectroscopy, X-Ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy techniques. The TEM images of the obtained HNPs showed that the surface of cobalt ferrite was covered with gold nanoclusters, the size of which slightly increased with an increase in the number of gold deposition cycles (from 2.12 ± 0.15 nm after 1 cycle to 2.46 ± 0.13 nm after 10 cycles). The density of the Au clusters on the cobalt ferrite surface insignificantly decreased during repeated stages of gold deposition: 21.4 ± 2.7 Au NPs/CoFe2O4 NP after 1 cycle, 19.0 ± 1.2 after 6 cycles and 18.0 ± 1.4 after 10 cycles. The magnetic measurements showed that the obtained HNPs possessed typical ferrimagnetic behavior, which corresponds to that of CoFe2O4 nanoparticles. The toxicity evaluation of the synthesized HNPs on Chlorella vulgaris indicated that they can be applied to biomedical applications such as magnetic hyperthermia, photothermal therapy, drug delivery, bioimaging and biosensing. View Full-Text
Keywords: CoFe2O4/Au nanoparticles; toxicity; X-ray photoelectron spectroscopy; anion-exchange resin precipitation; hybrid nanoparticles; synthesis; magnetic hysteresis loops CoFe2O4/Au nanoparticles; toxicity; X-ray photoelectron spectroscopy; anion-exchange resin precipitation; hybrid nanoparticles; synthesis; magnetic hysteresis loops
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MDPI and ACS Style

Saikova, S.; Pavlikov, A.; Trofimova, T.; Mikhlin, Y.; Karpov, D.; Asanova, A.; Grigoriev, Y.; Volochaev, M.; Samoilo, A.; Zharkov, S.; Velikanov, D. Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization. Metals 2021, 11, 705. https://doi.org/10.3390/met11050705

AMA Style

Saikova S, Pavlikov A, Trofimova T, Mikhlin Y, Karpov D, Asanova A, Grigoriev Y, Volochaev M, Samoilo A, Zharkov S, Velikanov D. Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization. Metals. 2021; 11(5):705. https://doi.org/10.3390/met11050705

Chicago/Turabian Style

Saikova, Svetlana, Alexander Pavlikov, Tatyana Trofimova, Yuri Mikhlin, Denis Karpov, Anastasiya Asanova, Yuri Grigoriev, Mikhail Volochaev, Alexander Samoilo, Sergey Zharkov, and Dmitry Velikanov. 2021. "Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization" Metals 11, no. 5: 705. https://doi.org/10.3390/met11050705

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