NMR Relaxation Efficiency of Aqueous Solutions of Composite MgxZnyFe3−x−yO4 Nanoparticles
- Autores: Bogachev Y.1, Nikitina A.1, Kostina A.1, Sabitova V.1, Pankov V.2, Shutava T.3, Petrova E.2, Kotsikau D.2, Natarov V.2, Livanovich K.3
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Afiliações:
- Department of Physics, Saint-Petersburg Electrotechnical University “LETI”
- Department of Chemistry, Belarusian State University
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus
- Edição: Volume 48, Nº 7 (2017)
- Páginas: 715-722
- Seção: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/247736
- DOI: https://doi.org/10.1007/s00723-017-0889-6
- ID: 247736
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Resumo
The results of proton nuclear magnetic resonance (NMR) relaxation measurements in aqueous solutions of MgxZnyFe3−x−yO4 magnetite-based composite magnetic nanoparticles (MNPs) are discussed. It is shown that their transverse relaxivity (relaxation efficiency) r2 is significantly higher than the longitudinal relaxivity r1 and depends on the magnetic nanoparticles composition and preparation method. A polyelectrolyte layer adsorbed on the nanoparticle surface increases both relaxivity values. The carbonate-synthesized MNPs possess higher values of r2 and r1 as compared with base-precipitated complex oxides. Relaxivity r2 is shown to be affected by stability of MNPs in aqueous solutions and the aggregation behavior apparently can be assessed through the NMR relaxation measurements.
Sobre autores
Yu. Bogachev
Department of Physics, Saint-Petersburg Electrotechnical University “LETI”
Autor responsável pela correspondência
Email: Yu.Bogachev@mail.ru
Rússia, 5, prof. Popov St., Saint-Petersburg, 197376
A. Nikitina
Department of Physics, Saint-Petersburg Electrotechnical University “LETI”
Email: Yu.Bogachev@mail.ru
Rússia, 5, prof. Popov St., Saint-Petersburg, 197376
A. Kostina
Department of Physics, Saint-Petersburg Electrotechnical University “LETI”
Email: Yu.Bogachev@mail.ru
Rússia, 5, prof. Popov St., Saint-Petersburg, 197376
V. Sabitova
Department of Physics, Saint-Petersburg Electrotechnical University “LETI”
Email: Yu.Bogachev@mail.ru
Rússia, 5, prof. Popov St., Saint-Petersburg, 197376
V. Pankov
Department of Chemistry, Belarusian State University
Email: Yu.Bogachev@mail.ru
Belarus, 4, Nezavisimosti Av., Minsk, 220030
T. Shutava
Institute of Chemistry of New Materials, National Academy of Sciences of Belarus
Email: Yu.Bogachev@mail.ru
Belarus, 36, F. Skaryna St., Minsk, 220141
E. Petrova
Department of Chemistry, Belarusian State University
Email: Yu.Bogachev@mail.ru
Belarus, 4, Nezavisimosti Av., Minsk, 220030
D. Kotsikau
Department of Chemistry, Belarusian State University
Email: Yu.Bogachev@mail.ru
Belarus, 4, Nezavisimosti Av., Minsk, 220030
V. Natarov
Department of Chemistry, Belarusian State University
Email: Yu.Bogachev@mail.ru
Belarus, 4, Nezavisimosti Av., Minsk, 220030
K. Livanovich
Institute of Chemistry of New Materials, National Academy of Sciences of Belarus
Email: Yu.Bogachev@mail.ru
Belarus, 36, F. Skaryna St., Minsk, 220141