Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au
In this study, NiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticles were prepared by the direct reduction of gold on the magnetic surface using amino acid methionine as a reducer and a stabilizing agent simultaneously. The obtained nanoparticles after three steps of gold...
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MDPI AG
2020-08-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/10/8/1075 |
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| author | Diana Saykova Svetlana Saikova Yuri Mikhlin Marina Panteleeva Ruslan Ivantsov Elena Belova |
| author_facet | Diana Saykova Svetlana Saikova Yuri Mikhlin Marina Panteleeva Ruslan Ivantsov Elena Belova |
| author_sort | Diana Saykova |
| collection | DOAJ |
| description | In this study, NiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticles were prepared by the direct reduction of gold on the magnetic surface using amino acid methionine as a reducer and a stabilizing agent simultaneously. The obtained nanoparticles after three steps of gold deposition had an average size of about 120 nm. The analysis of particles was performed by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques. The results indicate successful synthesis of core–shell particles with the magnetic core, which consists of a few agglomerated nickel ferrite crystals with an average size 25.2 ± 2.0 nm, and the thick gold shell consists of fused Au<sup>0</sup> nanoparticles (NPs). Magnetic properties of the obtained nanoparticles were examined with magnetic circular dichroism. It was shown that the magnetic behavior of NiFe<sub>2</sub>O<sub>4</sub>@Au NPs is typical for superparamagnetic NPs and corresponds to that for NiFe<sub>2</sub>O<sub>4</sub> NPs without a gold shell. The results indicate the successful synthesis of core–shell particles with the magnetic nickel ferrite core and thick gold shell, and open the potential for the application of the investigated hybrid nanoparticles in hyperthermia, targeted drug delivery, magnetic resonance imaging, or cell separation. The developed synthesis strategy can be extended to other metal ferrites and iron oxides. |
| first_indexed | 2024-03-10T17:43:07Z |
| format | Article |
| id | doaj.art-c6640574712f4629971dc3e9c31fa01c |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T17:43:07Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-c6640574712f4629971dc3e9c31fa01c2023-11-20T09:39:10ZengMDPI AGMetals2075-47012020-08-01108107510.3390/met10081075Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@AuDiana Saykova0Svetlana Saikova1Yuri Mikhlin2Marina Panteleeva3Ruslan Ivantsov4Elena Belova5School of Non-Ferrous Metals and Material Science, Siberian Federal University, 660041 Krasnoyarsk, RussiaSchool of Non-Ferrous Metals and Material Science, Siberian Federal University, 660041 Krasnoyarsk, RussiaInstitute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036 Krasnoyarsk, RussiaInstitute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036 Krasnoyarsk, RussiaKirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Akademgorodok, 660036 Krasnoyarsk, RussiaSchool of Non-Ferrous Metals and Material Science, Siberian Federal University, 660041 Krasnoyarsk, RussiaIn this study, NiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticles were prepared by the direct reduction of gold on the magnetic surface using amino acid methionine as a reducer and a stabilizing agent simultaneously. The obtained nanoparticles after three steps of gold deposition had an average size of about 120 nm. The analysis of particles was performed by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy techniques. The results indicate successful synthesis of core–shell particles with the magnetic core, which consists of a few agglomerated nickel ferrite crystals with an average size 25.2 ± 2.0 nm, and the thick gold shell consists of fused Au<sup>0</sup> nanoparticles (NPs). Magnetic properties of the obtained nanoparticles were examined with magnetic circular dichroism. It was shown that the magnetic behavior of NiFe<sub>2</sub>O<sub>4</sub>@Au NPs is typical for superparamagnetic NPs and corresponds to that for NiFe<sub>2</sub>O<sub>4</sub> NPs without a gold shell. The results indicate the successful synthesis of core–shell particles with the magnetic nickel ferrite core and thick gold shell, and open the potential for the application of the investigated hybrid nanoparticles in hyperthermia, targeted drug delivery, magnetic resonance imaging, or cell separation. The developed synthesis strategy can be extended to other metal ferrites and iron oxides.https://www.mdpi.com/2075-4701/10/8/1075nickel ferrite nanoparticlesNiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticlessynthesisX-ray photoelectron spectroscopymagnetic circular dichroism |
| spellingShingle | Diana Saykova Svetlana Saikova Yuri Mikhlin Marina Panteleeva Ruslan Ivantsov Elena Belova Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au Metals nickel ferrite nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticles synthesis X-ray photoelectron spectroscopy magnetic circular dichroism |
| title | Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au |
| title_full | Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au |
| title_fullStr | Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au |
| title_full_unstemmed | Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au |
| title_short | Synthesis and Characterization of Core–Shell Magnetic Nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au |
| title_sort | synthesis and characterization of core shell magnetic nanoparticles nife sub 2 sub o sub 4 sub au |
| topic | nickel ferrite nanoparticles NiFe<sub>2</sub>O<sub>4</sub>@Au core–shell nanoparticles synthesis X-ray photoelectron spectroscopy magnetic circular dichroism |
| url | https://www.mdpi.com/2075-4701/10/8/1075 |
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