High-resolution magnetic force microscope images of a magnetic particle chain extracted from magnetic bacteria AMB-1

Hitoshi Suzuki, Tsuyoshi Tanaka, Tomohito Sasaki, Noriyuki Nakamura, Tadashi Matsunaga, Shinro Mashiko

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Bacterial magnetic particles were observed by an atomic force microscope (AFM) and a magnetic force microscope (MFM). The chain of magnetic particles was extracted from the bacteria with little disturbance to their alignment by a new preparation method. Magnetic bacteria cells were broken using an NaOH/ethanol solution. Cell debris was washed away in order to leave the magnetic particle chains, which were held on the glass surface by a magnet. In both AFM and MFM images, individual magnetic particles could be clearly observed. The MFM image showed that the particles aligned their magnetized axes along the chain.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number11 PART A
Publication statusPublished - 1998 Nov 1
Externally publishedYes



  • AFM
  • Magnetic bacterium
  • Magnetite
  • Magnetotaxis
  • MFM

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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