Abstract
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.
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Acknowledgments
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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Pósfai, M., Kasama, T., Dunin-Borkowski, R.E. (2006). Characterization of Bacterial Magnetic Nanostructures Using High-Resolution Transmission Electron Microscopy and Off-Axis Electron Holography. In: Schüler, D. (eds) Magnetoreception and Magnetosomes in Bacteria. Microbiology Monographs, vol 3. Springer, Berlin, Heidelberg . https://doi.org/10.1007/7171_044
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DOI: https://doi.org/10.1007/7171_044
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