Chapter

Magnetoreception and Magnetosomes in Bacteria

Volume 3 of the series Microbiology Monographs pp 197-225

Date:

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

  • Mihály PósfaiAffiliated withDepartment of Earth and Environmental Sciences, Pannon University Email author 
  • , Takeshi KasamaAffiliated withFrontier Research System, The Institute of Physical and Chemical ResearchDepartment of Materials Science and Metallurgy, University of Cambridge
  • , Rafal E. Dunin-BorkowskiAffiliated withFrontier Research System, The Institute of Physical and Chemical ResearchDepartment of Materials Science and Metallurgy, University of Cambridge

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.