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Вид документа : Статья из журнала
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Автор(ы) : Raikher Y. L., Stepanov V. I., Stolyar S. V., Ladygina V. P., Balaev D. A., Ishchenko L. A., Balasoiu M.
Заглавие : Magnetic properties of biomineral particles produced by bacteria Klebsiella oxytoca
Коллективы :
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2010. - Vol. 52, Is. 2. - P298-305. - ISSN 1063-7834, DOI 10.1134/S1063783410020125
Примечания : Cited References: 29. - This study was supported by the Russian Foundation for Basic Research (project nos. 07-02-96026, 07- 02-96017, and 08-02-00802) and performed within the framework of the Federal Target Program "Research and Research-Pedagogical Personnel of Innovation Russia for 2009-2013."
Предметные рубрики: FERRITIN
NANOPARTICLES
IRON
SUSCEPTIBILITY
FERRIHYDRITE
BEHAVIOR
FINS
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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