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
-
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
Cite item
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.
Keywords
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
Supplementary files
