• Submit to Applied Sciences Login Register
• MDPI
• Journals A-Z
• For Authors
• For Editors
• About
• Open Access Policy

• Abstract
• Full-Text PDF [355 KB]
• Full-Text XML
• Article Versions Notes

• Article Statistics
• Google Scholar
• Order Reprints

• Cite this article
• Export to BibTeX
• Export to EndNote

• [+] on DOAJ
• Sorokina, O
• Kovarski, A
• Lagutina, M
• Dubrovskii, S
• Dzheparov, F
• [+] on Google Scholar
• Sorokina, O
• Kovarski, A
• Lagutina, M
• Dubrovskii, S
• Dzheparov, F
• [+] on PubMed
• Sorokina, O
• Kovarski, A
• Lagutina, M
• Dubrovskii, S
• Dzheparov, F

•  CiteULike
•  Facebook
•  Mendeley
•  Twitter

This article is

• freely available
• re-usable

Appl. Sci. 2012, 2(2), 342-350; doi:10.3390/app2020342

Article

Magnetic Nanoparticles Aggregation in Magnetic Gel Studied by Electron Magnetic Resonance (EMR)

Olga N. Sorokina ^1,* , Alexander L. Kovarski ¹ , Marina A. Lagutina ² , Sergey A. Dubrovskii ²  and Fridrikh S. Dzheparov ³

¹ Emanuel Institute of Biochemical Physics of RAS, Kosygina st., 4, 119334 Moscow, Russia ² Semenov Institute of Chemical Physics of RAS, Kosygina st., 4, 119991 Moscow, Russia ³ Alikhanov Institute for Theoretical and Experimental Physics, Bol’shaya Cheremushkinskaya st., 25, 117218 Moscow, Russia

* Author to whom correspondence should be addressed.

Received: 7 February 2012; in revised form: 26 March 2012 / Accepted: 27 March 2012 / Published: 10 April 2012

Download PDF Full-Text [355 KB, Updated Version, uploaded 11 April 2012 13:43 CEST]

The original version is still available [344 KB, uploaded 10 April 2012 11:13 CEST]

Abstract: Aggregation of magnetic nanoparticles immobilized in polymer gels was studied by ferromagnetic resonance and paramagnetic sensor techniques. Ferromagnetic resonance spectra of magnetic gels prepared in the presence of external magnetic field of 1.5 kG were compared to the spectra of gels synthesized in the absence of a magnetic field. Application of a magnetic field led to formation of linear aggregates of magnetic particles in the polymer matrix. The aggregates did not come apart after the field was switched off. The fraction of aggregated particles (of 62(6)%) and aspect ratio (elongation) of the aggregates (12.6(1.3)) was determined using paramagnetic sensor technique.

Keywords: magnetic gels; nanoparticles; linear aggregates; paramagnetic sensor technique; ferromagnetic resonance

Article Statistics

Cite This Article