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Updated: Jun 23, 2026

Collection, Isolation and Enrichment of Naturally Occurring Magnetotactic Bacteria from the Environment
Published on: November 15, 2012
Assemblies of aligned magnetotactic bacteria and extracted magnetosomes: what is the main factor responsible for the
E Alphandéry1, Y Ding, A T Ngo
1Universite Pierre et Marie-Curie, Laboratoire des materiaux mesoscopiques et nanometriques (LM2N), 4 place Jussieu, Paris cedex 05, France.
Abstract:
The origin of the magnetic anisotropy is explained in an assembly of aligned magnetic nanoparticles. For that, nanoparticles synthesized biologically by Magnetospirillum magneticum AMB-1 magnetotactic bacteria are used. For the first time, it is possible to differentiate between the two contributions arising from the alignment of the magnetosome easy axes and the strength of the magnetosome dipolar interactions. The magnetic anisotropy is shown to arise mainly from the dipolar interactions between the magnetosomes.
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