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Science 4 December 1998:
Vol. 282. no. 5395, p. 1781
DOI: 10.1126/science.282.5395.1781e
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This Week in Science

Magnetotactic bacteria contain chains of small crystals of magnetite (or other minerals) several nanometers across. Dunin-Borkowski et al. (p. 1868) have now used electron holography to image the magnetic microstructure of individual crystals and crystal chains in situ in bacteria. In this approach, they compare an electron wave passing through the sample with a reference wave to create a holographic image. The magnetization directions of the smallest crystals were controlled by the larger crystals in the chains. This approach, which shows how these crystals may interact within the bacteria, might be extended to magnetite crystals in higher organisms.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)