Magnetic properties of biomineral particles produced by bacteria Klebsiella oxytoca

Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1134/S1063783410020125

Аннотация: Ferrihydrite nanoparticles (2-5 nm in size) produced by bacteria Klebsiella oxytoca in the course of biomineralization of iron salt solutions from a natural medium exhibit unique magnetic properties: they are characterized by both the antiferromagnetic order inherent in a bulk ferrihydrite and the spontaneous magnetic moment due to the decompensation of spins in sublattices of a nanoparticle. The magnetic susceptibility enhanced by the superantiferromagnetism effect and the magnetic moment independent of the magnetic field provide the possibility of magnetically controlling these natural objects. This has opened up the possibilities for their use in nanomedicine and bioengineering. The results obtained from measurements of the magnetic properties of the ferrihydrite produced by Klebsiella oxytoca in its two main crystalline modifications are reported, and the data obtained are analyzed theoretically. This has made it possible to determine numerical values of the magnetic parameters of real biomineral nanoparticles.

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Выпуск журнала: Vol. 52, Is. 2

Номера страниц: 298-305

ISSN журнала: 10637834

Место издания: NEW YORK



  • Raikher Y.L. (Institute of Continuum Media Mechanics, Ural Division,Russian Academy of Sciences)
  • Stepanov V.I. (Institute of Continuum Media Mechanics, Ural Division,Russian Academy of Sciences)
  • Stolyar S.V. (Siberian Federal University)
  • Balaev D.A. (Siberian Federal University)
  • Ishchenko L.A. (Siberian Federal University)
  • Ladygina V.P. (International Scientific Center for Research of Organism under Extreme Conditions,Krasnoyarsk Scientific Center, Siberian Branch,Russian Academy of Sciences)
  • Balasoiu M. (Joint Institute for Nuclear Research)

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