Email this article Synthesis, Magnetic Properties, and Relaxivity of CoFe@C and NiFe@C Nanocomposites
- Authors: Byzov I.V.1,2, Mysik A.A.1, Konev A.S.1,3, Novikov S.I.1, Yermakov A.Y.1,2,3, Uimin M.A.1,2,3, Minin A.S.1,2,3, Gaviko V.S.1
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Affiliations:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the First President of Russia B.N. Yeltsin
- Issue: Vol 120, No 3 (2019)
- Pages: 254-259
- Section: Electrical and Magnetic Properties
- URL: https://journals.rcsi.science/0031-918X/article/view/168346
- DOI: https://doi.org/10.1134/S0031918X19030037
- ID: 168346
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Abstract
Core–shell CoFe@C and NiFe@C nanocomposites were prepared by gas-condensation synthesis. CoFe@C and NiFe@C particles had bcc and fcc cores, respectively. The treatment of these nanocomposites with hydrochloric acid revealed that they are more chemically stable than Fe@C composites. The maximum specific magnetization of CoFe@C and NiFe@C nanocomposites at room temperature in the field with a strength of 27 kOe was 125 and 58 G cm3/g, respectively. The processes of longitudinal and transverse relaxation of nuclear proton spins of aqueous suspensions of nanocomposites in various magnetic fields (0.5, 1, and 2 kOe) were studied. NiFe@C and CoFe@C nanocomposites have high transverse relaxivity values and can be used as magnetic markers for detection of low concentrations of bioobjects by NMR relaxometry.
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About the authors
I. V. Byzov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Perm, 614081
A. A. Mysik
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
A. S. Konev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Ekaterinburg, 620002
S. I. Novikov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
A. Ye. Yermakov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Perm, 614081; Ekaterinburg, 620002
M. A. Uimin
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin
Author for correspondence.
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Perm, 614081; Ekaterinburg, 620002
A. S. Minin
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Ecology and Genetics of Microorganisms, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108; Perm, 614081; Ekaterinburg, 620002
V. S. Gaviko
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: uimin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
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