Characterization of Bacterial Magnetic Nanostructures Using High-Resolution Transmission Electron Microscopy and Off-Axis Electron Holography

  • Mihály Pósfai
  • Takeshi Kasama
  • Rafal E. Dunin-Borkowski
Part of the Microbiology Monographs book series (MICROMONO, volume 3)


Magnetotactic bacteria can be regarded as model systems for studying the structural, chemical, and magnetic properties of arrangements of ferrimagnetic iron oxide and sulfide nanocrystals. The aim of the present chapter is to show how the size, shape, crystal structure, crystallographic orientation, and spatial arrangement of bacterial magnetite (Fe 3 O 4) and greigite (Fe3S4) crystals affect their magnetic properties. We present recent results obtained using transmission electron microscopy (TEM) techniques, including high-resolution TEM imaging and off-axis electron holography.


Double Chain Magnetotactic Bacterium Chain Axis Magnetite Crystal Electron Holography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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We thank Ed Simpson and Anna Finlayson for contributions to the EH measurements, and Ryan Chong for ET. This chapter benefited greatly from ongoing collaborations and discussions with Richard Frankel, Dirk Schüler, Dennis Bazylinski, Peter Buseck, and István Dódony. We thank Jian-Min Zuo and Jim Mabon for use of their WebEMAPS HRTEM image simulation software, and Werner Kaminsky for making the WinXMorph crystal morphology software available. R.D.B. acknowledges the Royal Society for support and M.P. acknowledges support from the Hungarian Science Fund (OTKA-T030186).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Mihály Pósfai
    • 1
  • Takeshi Kasama
    • 2
    • 3
  • Rafal E. Dunin-Borkowski
    • 2
    • 3
  1. 1.Department of Earth and Environmental SciencesPannon UniversityVeszprémHungary
  2. 2.Frontier Research SystemThe Institute of Physical and Chemical ResearchSaitamaJapan
  3. 3.Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUK

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