Assemblies of magnetite nanoparticles extracted from magnetotactic bacteria: A magnetic study
نویسندگان
چکیده
منابع مشابه
Structural purity of magnetite nanoparticles in magnetotactic bacteria
Magnetosome biomineralization and chain formation in magnetotactic bacteria are two processes that are highly controlled at the cellular level in order to form cellular magnetic dipoles. However, even if the magnetosome chains are well characterized, controversial results about the microstructure of magnetosomes were obtained and its possible influence in the formation of the magnetic dipole is...
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A previously undescribed magnetotactic spirillum isolated from a freshwater swamp was mass cultured in the magnetic as well as the nonmagnetic state in chemically defined culture media. Results of Mossbauer spectroscopic analysis applied to whole cells identifies magnetite as a constituent of these magnetic bacteria.
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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 dip...
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This paper reports on the magnetic properties of magnetosomes in the freshwater magnetotactic bacterium Aquaspirillum nlllgnetOlaClicwn. The magnetosomes are well crystallized particles of magnetite with dimensions of 40 to 50 nm, which are arranged within cells in a single linear chain and are within the single-magnetic-domain (SO) size range for. magnetite. A variety of magnetic properties ha...
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a Biogeomagnetism Group, Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China b France-China Bio-Mineralization and Nano-Structures Laboratory, Beijing 100029, China c Laboratoire de Microscopies et d'Etude de Nanostructures (LMEN), Université de Reims, 59687 Reims, France d Institut de Minéralogie et Physique des M...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2016
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.4941835